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Halotrichite

A valid IMA mineral species - grandfathered

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Photos of Halotrichite (230)

Halotrichite Gallery Search Photos of Halotrichite

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Halotrichite

Faraglione Ranni, Faraglioni di Levante, Porto Levante, Vulcano Island, Lipari, Eolie Islands, Metropolitan City of Messina, Sicily, Italy

Halotrichite

Golden Queen Mine, Soledad Mountain project, Soledad Mountain deposit, Soledad Mountain, Mojave, Mojave-Rosamond Mining District, Kern County, California, USA

Halotrichite

Dubník, Červenica, Prešov District, Prešov Region, Slovakia

Halotrichite

Faraglione Ranni, Faraglioni di Levante, Porto Levante, Vulcano Island, Lipari, Eolie Islands, Metropolitan City of Messina, Sicily, Italy

Halotrichite

Golden Queen Mine, Soledad Mountain project, Soledad Mountain deposit, Soledad Mountain, Mojave, Mojave-Rosamond Mining District, Kern County, California, USA

Halotrichite

Dubník, Červenica, Prešov District, Prešov Region, Slovakia

Halotrichite

Faraglione Ranni, Faraglioni di Levante, Porto Levante, Vulcano Island, Lipari, Eolie Islands, Metropolitan City of Messina, Sicily, Italy

Halotrichite

Golden Queen Mine, Soledad Mountain project, Soledad Mountain deposit, Soledad Mountain, Mojave, Mojave-Rosamond Mining District, Kern County, California, USA

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About HalotrichiteHide

Formula:

FeAl₂(SO₄)₄ · 22H₂O

Colour:

Colourless to white, yellowish, greenish; colourless in transmitted light.

Lustre:

Silky

Hardness:

1½ - 2

Specific Gravity:

1.89

Crystal System:

Monoclinic

Member of:

Halotrichite Group

Name:

Named in 1839 by Ernst Friedrich Glocker from the Greek αλζ meaning salt and τρικοζ meaning hair. Latin form is "halotrichum," which in turn is from the older German name "Haarsalz" (hair salt).

Halotrichite Group; Halotrichite-Pickeringite Series.
Fe(II) analogue of Pickeringite.

At least a partial series extends toward Apjohnite.

Unique IdentifiersHide

Mindat ID:

1809

Long-form identifier:

mindat:1:1:1809:4

GUID
(UUID V4):

b1c6e104-8d3b-4059-8a25-da955aca85bb

IMA Classification of HalotrichiteHide

IMA status:

Approved, 'Grandfathered' (first described prior to 1959)

IMA Formula:

Fe²⁺Al₂(SO₄)₄ · 22H₂O

Classification of HalotrichiteHide

Strunz-mindat (2024):

7.CB.85

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H₂O
B : With only medium-sized cations

Dana 8th ed.:

29.7.3.2

29 : HYDRATED ACID AND NORMAL SULFATES
7 : AB₂(XO₄)₄·H₂O

Hey's CIM Ref.:

25.11.26

25 : Sulphates
11 : Sulphates of Fe and other metals

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Hth	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of HalotrichiteHide

Pronunciation:

Play	Recorded by	Country
	Jolyon Ralph	United Kingdom

Physical Properties of HalotrichiteHide

Lustre:

Silky

Transparency:

Transparent, Translucent

Colour:

Colourless to white, yellowish, greenish; colourless in transmitted light.

Streak:

White

Hardness:

1½ - 2 on Mohs scale

Tenacity:

Brittle

Cleavage:

Poor/Indistinct
On {010}, poor.

Fracture:

Conchoidal

Density:

1.89 g/cm³ (Measured) 1.95 g/cm³ (Calculated)

Comment:

Pure end member values.

Optical Data of HalotrichiteHide

Type:

Biaxial (-)

RI values:

n_α = 1.480 n_β = 1.486 n_γ = 1.490

2V:

Measured: 35° , Calculated: 78°

Max Birefringence:

δ = 0.010

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Moderate

Dispersion:

none

Chemistry of HalotrichiteHide

Mindat Formula:

FeAl₂(SO₄)₄ · 22H₂O

Elements listed:

Al, Fe, H, O, S - search for minerals with similar chemistry

Crystallography of HalotrichiteHide

Crystal System:

Monoclinic

Class (H-M):

2 - Sphenoidal

Space Group:

Cell Parameters:

a = 20.51 Å, b = 24.29 Å, c = 6.18 Å
β = 100.99°

Ratio:

a:b:c = 0.844 : 1 : 0.254

Unit Cell V:

3,022.34 Å³ (Calculated from Unit Cell)

Morphology:

Crystals acicular [001]; distinctly terminated crystals rare. Radial or matted aggregates of hair-like crystals; tufted; spheroidal; as incrustations or efflorescences; asbestiform. Larger crystals may be hollow or contain bubbles of liquid or gas.

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0011972	Halotrichite	Lovas G A (1986) Structural study of halotrichite from Recsk (Matra Mts., N-Hungary) Acta Geologica Hungarica 29 389-398		1986	Recsk, Matra Mountains, Hungary	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Halotrichite'
loop_
_publ_author_name
'Lovas G A'
_journal_name_full 'Acta Geologica Hungarica'
_journal_volume 29 
_journal_year 1986
_journal_page_first 389
_journal_page_last 398
_publ_section_title
;
 Structural study of halotrichite from Recsk (Matra Mts., N-Hungary)
;
_database_code_amcsd 0011972
_chemical_compound_source 'Recsk, Matra Mountains, Hungary'
_chemical_formula_sum 'Fe.99 Mg.02 Mn.01 Al1.98 S4 O38 H44'
_cell_length_a 6.1954
_cell_length_b 24.262
_cell_length_c 21.262
_cell_angle_alpha 90
_cell_angle_beta 100.30
_cell_angle_gamma 90
_cell_volume 3144.448
_exptl_crystal_density_diffrn      1.881
_symmetry_space_group_name_H-M 'P 1 21/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Fe2+   0.38500   0.59500   0.07600   0.97000   0.02913
Mg   0.38500   0.59500   0.07600   0.02000   0.02913
Mn   0.38500   0.59500   0.07600   0.01000   0.02913
Al1   0.42000   0.61600   0.41100   0.99000   0.02913
Fe3+1   0.42000   0.61600   0.41100   0.01000   0.02913
Al2   0.70700   0.33500   0.19500   0.99000   0.02913
Fe3+2   0.70700   0.33500   0.19500   0.01000   0.02913
S1   0.08700   0.24400   0.50500   1.00000   0.02913
S2   0.96500   0.47500   0.37600   1.00000   0.02913
S3   0.12300   0.19400   0.24200   1.00000   0.02913
S4   0.14500   0.47700   0.09400   1.00000   0.02913
O1   0.33300   0.51900   0.11500   1.00000   0.02913
Wat2   0.72500   0.59000   0.11900   1.00000   0.02913
Wat3   0.34300   0.63500   0.16400   1.00000   0.02913
Wat4   0.45600   0.67400   0.03700   1.00000   0.02913
Wat5   0.06300   0.60700   0.04300   1.00000   0.02913
Wat6   0.41600   0.55600  -0.01000   1.00000   0.02913
Wat7   0.47800   0.55300   0.36000   1.00000   0.02913
Wat8   0.12900   0.62100   0.37700   1.00000   0.02913
Wat9   0.51400   0.66200   0.35300   1.00000   0.02913
Wat10   0.35500   0.67900   0.46200   1.00000   0.02913
Wat11   0.70800   0.61200   0.44600   1.00000   0.02913
Wat12   0.33300   0.56900   0.47000   1.00000   0.02913
Wat13   0.55500   0.32100   0.11000   1.00000   0.02913
Wat14   0.96000   0.30700   0.17500   1.00000   0.02913
Wat15   0.62200   0.26300   0.21200   1.00000   0.02913
Wat16   0.86000   0.34900   0.27800   1.00000   0.02913
Wat17   0.45000   0.36100   0.21200   1.00000   0.02913
Wat18   0.79000   0.40600   0.17600   1.00000   0.02913
O19   0.13100   0.22400   0.44200   1.00000   0.02913
O20  -0.02500   0.30200   0.50600   1.00000   0.02913
O21  -0.09200   0.21100   0.54100   1.00000   0.02913
O22   0.28600   0.24000   0.53600   1.00000   0.02913
O23   0.01200   0.42300   0.31200   1.00000   0.02913
O24   0.90500   0.52900   0.35500   1.00000   0.02913
O25   0.16600   0.46500   0.41400   1.00000   0.02913
O26   0.78700   0.44500   0.39900   1.00000   0.02913
O27   0.10500   0.18500   0.30700   1.00000   0.02913
O28   0.20200   0.25500   0.23300   1.00000   0.02913
O29  -0.09900   0.17800   0.21100   1.00000   0.02913
O30   0.27300   0.16200   0.21300   1.00000   0.02913
O31   0.14600   0.46100   0.16100   1.00000   0.02913
O32   0.21200   0.42900   0.05000   1.00000   0.02913
O33  -0.07500   0.48900   0.10200   1.00000   0.02913
Wat34   0.68800   0.25300   0.34400   1.00000   0.02913
Wat35   0.31100   0.52500   0.28000   1.00000   0.02913
Wat36   0.67900   0.49500   0.17900   1.00000   0.02913
Wat37   0.41600   0.43400   0.35800   1.00000   0.02913
Wat38   0.39800   0.27700   0.41300   1.00000   0.02913

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
6.02 Å	(35)
4.93 Å	(21)
4.78 Å	(100)
4.29 Å	(31)
3.947 Å	(21)
3.751 Å	(27)
3.484 Å	(75)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 3b: Earth’s earliest hydrosphere	>4.45
14 : Hot springs, geysers, and other subaerial geothermal minerals
Stage 7: Great Oxidation Event	<2.4
45a : [Sulfates, arsenates, selenates, antimonates]
47a : [Near-surface hydration of prior minerals]
47b : [Sulfates and sulfites]
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere	<0.6
50 : Coal and/or oil shale minerals	<0.36
Stage 10b: Anthropogenic minerals	<10 Ka
54 : Coal and other mine fire minerals (see also #51 and #56)
55 : Anthropogenic mine minerals

Synonyms of HalotrichiteHide

Butter-Rock

Feather Alum (in part)

Halotrichite (of Glocker)

Iron Alum

Mountain Butter

Hair-salt (in part)

Halotrichum (in part)

Other Language Names for HalotrichiteHide

French:Alotrichite

German:Alotrichit
Eisenalaun
Federalaun vom Freyenwalde
Halotrichit
Halotrichit (of Glocker)
Hversalt
Federalaun (in part)

Italian:Halotrichine

Simplified Chinese:铁茂

Spanish:Alotrichita
Halotrichita

Varieties of HalotrichiteHide

Bergbutter	A pale yellow crust or tuberose efflorescence found on slate or shale. Noted for a greasy feel when rubbed.
Masrite	A manganoan and cobaltoan variety of Halotrichite. Originally reported from Egypt.

Relationship of Halotrichite to other SpeciesHide

Member of:

Halotrichite Group

Other Members of this group:

Apjohnite	Mn²⁺Al₂(SO₄)₄ · 22H₂O	Mon. 2/m : P2₁/b
Bílinite	Fe²⁺Fe³⁺₂(SO₄)₄ · 22H₂O	Mon. 2/m : P2₁/b
Dietrichite	(Zn,Fe²⁺,Mn²⁺)Al₂(SO₄)₄ · 22H₂O	Mon. 2/m : P2₁/b
Pickeringite	MgAl₂(SO₄)₄ · 22H₂O	Mon. 2/m : P2₁/b
Redingtonite	(Fe²⁺,Mg,Ni)(Cr,Al)₂(SO₄)₄ · 22H₂O	Mon. 2
Wupatkiite	(Co,Mg,Ni)Al₂(SO₄)₄ · 22H₂O	Mon. 2/m : P2₁/b

Forms a series with:

Pickeringite

Halotrichite-Pickeringite Series

Common AssociatesHide

Associated Minerals Based on Photo Data:

88 photos of Halotrichite associated with Römerite	Fe²⁺Fe³⁺₂(SO₄)₄ · 14H₂O
73 photos of Halotrichite associated with Voltaite	K₂Fe²⁺₅Fe³⁺₃Al(SO₄)₁₂ · 18H₂O
57 photos of Halotrichite associated with Coquimbite	AlFe₃(SO₄)₆(H₂O)₁₂ · 6H₂O
37 photos of Halotrichite associated with Copiapite	Fe²⁺Fe³⁺₄(SO₄)₆(OH)₂ · 20H₂O
33 photos of Halotrichite associated with Botryogen	MgFe³⁺(SO₄)₂(OH) · 7H₂O
24 photos of Halotrichite associated with Melanterite	Fe²⁺(H₂O)₆SO₄ · H₂O
23 photos of Halotrichite associated with Krausite	KFe(SO₄)₂ · H₂O
22 photos of Halotrichite associated with Chalcanthite	CuSO₄ · 5H₂O
19 photos of Halotrichite associated with Pyrite	FeS₂
18 photos of Halotrichite associated with Sulphur	S₈

Related Minerals - Strunz-mindat Grouping Hide

7.CB.	Sarvodaite	Al₂(SO₄)₃ · 5H₂O	Mon. 2/m : P2₁/m
7.CB.02	Voudourisite	CdSO₄ · H₂O	Mon. 2/m : P2₁/m
7.CB.05	Dwornikite	Ni(SO₄) · H₂O	Mon. 2/m : B2/b
7.CB.05	Gunningite	ZnSO₄ · H₂O	Mon. 2/m : B2/b
7.CB.05	Kieserite	MgSO₄ · H₂O	Mon. 2/m : B2/b
7.CB.05	Poitevinite	(Cu,Fe)SO₄ · H₂O	Tric. 1 : P1
7.CB.05	Szmikite	MnSO₄ · H₂O	Mon. 2/m : B2/b
7.CB.05	Szomolnokite	FeSO₄ · H₂O	Mon. 2/m : B2/b
7.CB.05	Cobaltkieserite	CoSO₄ · H₂O	Mon. 2/m : B2/b
7.CB.07	Sanderite	MgSO₄ · 2H₂O	Orth. 2 2 2 : P2₁ 2₁ 2₁
7.CB.10	Bonattite	CuSO₄ · 3H₂O	Mon. m : Bb
7.CB.12	Belogubite	CuZn(SO₄)₂ · 10H₂O	Tric. 1 : P1
7.CB.15	Aplowite	(Co,Mn,Ni)SO₄ · 4H₂O	Mon. 2/m
7.CB.15	Boyleite	(Zn,Mg)SO₄ · 4H₂O	Mon. 2/m : P2₁/b
7.CB.15	Ilesite	(Mn,Zn,Fe)SO₄ · 4H₂O	Mon. 2/m
7.CB.15	Rozenite	FeSO₄ · 4H₂O	Mon. 2/m : P2₁/b
7.CB.15	Starkeyite	MgSO₄ · 4H₂O	Mon. 2/m : P2₁/b
7.CB.15	Drobecite	CdSO₄ · 4H₂O	Mon. 2/m : P2₁/m
7.CB.15	Cranswickite	MgSO₄ · 4H₂O	Mon. m : Bb
7.CB.20	Chalcanthite	CuSO₄ · 5H₂O	Tric. 1 : P1
7.CB.20	Jôkokuite	MnSO₄ · 5H₂O	Tric. 1 : P1
7.CB.20	Pentahydrite	MgSO₄ · 5H₂O	Tric. 1 : P1
7.CB.20	Siderotil	FeSO₄ · 5H₂O	Tric.
7.CB.25	Bianchite	Zn(SO₄) · 6H₂O	Mon. 2/m : P2/m
7.CB.25	Chvaleticeite	Mn(SO₄) · 6H₂O	Mon. 2/m : B2/b
7.CB.25	Ferrohexahydrite	FeSO₄ · 6H₂O	Mon. 2/m : B2/b
7.CB.25	Hexahydrite	MgSO₄ · 6H₂O	Mon. 2/m : P2/m
7.CB.25	Moorhouseite	Co(SO₄) · 6H₂O	Mon. 2/m : B2/b
7.CB.25	Nickelhexahydrite	Ni(SO₄) · 6H₂O	Mon. 2/m : B2/b
7.CB.30	Retgersite	NiSO₄ · 6H₂O	Tet. 4 2 2 : P4₁ 2₁ 2
7.CB.35	Bieberite	CoSO₄ · 7H₂O	Mon. 2/m : P2/m
7.CB.35	Boothite	CuSO₄ · 7H₂O	Mon. 2/m : P2₁/b
7.CB.35	Mallardite	MnSO₄ · 7H₂O	Mon. 2/m : P2/m
7.CB.35	Melanterite	Fe²⁺(H₂O)₆SO₄ · H₂O	Mon. 2/m : P2₁/b
7.CB.35	Zincmelanterite	(Zn,Cu,Fe)SO₄ · 7H₂O	Mon. 2/m : P2₁/b
7.CB.35	Alpersite	(Mg,Cu)(SO₄) · 7H₂O	Mon. 2/m : P2₁/b
7.CB.40	Epsomite	MgSO₄ · 7H₂O	Orth. 2 2 2 : P2₁ 2₁ 2₁
7.CB.40	Goslarite	ZnSO₄ · 7H₂O	Orth. 2 2 2 : P2₁ 2₁ 2₁
7.CB.40	Morenosite	NiSO₄ · 7H₂O	Orth. 2 2 2 : P2₁ 2₁ 2₁
7.CB.45	Alunogen	Al₂(SO₄)₃ · 17H₂O	Tric. 1 : P1
7.CB.45	Meta-alunogen	Al₂(SO₄)₃ · 12H₂O	Orth.
7.CB.50	Aluminocoquimbite	Al₂Fe₂(SO₄)₆(H₂O)₁₂ · 6H₂O	Trig. 3m (3 2/m) : P3 1c
7.CB.50	Lazaridisite	3CdSO₄ · 8H₂O	Mon. 2/m : B2/b
7.CB.52	Pararaisaite	CuMg[Te⁶⁺O₄(OH)₂] · 6H₂O	Mon. 2/m : P2₁/b
7.CB.55	Coquimbite	AlFe₃(SO₄)₆(H₂O)₁₂ · 6H₂O	Trig. 3m (3 2/m) : P3 1c
7.CB.55	Paracoquimbite	Fe₄(SO₄)₆(H₂O)₁₂ · 6H₂O	Trig. 3 : R3
7.CB.55	Rhomboclase	(H₅O₂)Fe³⁺(SO₄)₂ · 2H₂O	Orth. mmm (2/m 2/m 2/m) : Pnma
7.CB.55	Raisaite	CuMg[Te⁶⁺O₄(OH)₂] · 6H₂O	Mon. 2/m : B2/b
7.CB.57	Caichengyunite	Fe²⁺₃Al₂(SO₄)₆ · 30H₂O	Mon.
7.CB.60	Kornelite	Fe₂(SO₄)₃ · 7H₂O	Mon. 2/m : P2₁/m
7.CB.65	Quenstedtite	Fe₂(SO₄)₃ · 11H₂O	Tric. 1 : P1
7.CB.70	Lausenite	Fe₂(SO₄)₃ · 5H₂O	Mon. 2/m : P2₁/m
7.CB.75	Lishizhenite	ZnFe₂(SO₄)₄ · 14H₂O	Tric. 1 : P1
7.CB.75	Römerite	Fe²⁺Fe³⁺₂(SO₄)₄ · 14H₂O	Tric. 1 : P1
7.CB.80	Ransomite	CuFe₂(SO₄)₄ · 6H₂O	Mon. 2/m : P2₁/b
7.CB.85	Apjohnite	Mn²⁺Al₂(SO₄)₄ · 22H₂O	Mon. 2/m : P2₁/b
7.CB.85	Bílinite	Fe²⁺Fe³⁺₂(SO₄)₄ · 22H₂O	Mon. 2/m : P2₁/b
7.CB.85	Dietrichite	(Zn,Fe²⁺,Mn²⁺)Al₂(SO₄)₄ · 22H₂O	Mon. 2/m : P2₁/b
7.CB.85	Pickeringite	MgAl₂(SO₄)₄ · 22H₂O	Mon. 2/m : P2₁/b
7.CB.85	Redingtonite	(Fe²⁺,Mg,Ni)(Cr,Al)₂(SO₄)₄ · 22H₂O	Mon. 2
7.CB.85	Wupatkiite	(Co,Mg,Ni)Al₂(SO₄)₄ · 22H₂O	Mon. 2/m : P2₁/b
7.CB.90	Meridianiite	MgSO₄ · 11H₂O	Tric. 1 : P1

Other InformationHide

Notes:

Completely soluble in water to an acid solution.

It can exhibit a fiber-optic image transmission effect (Baur et al. 1957).

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for HalotrichiteHide

mindat.org URL:

https://www.mindat.org/min-1809.html
Please feel free to link to this page.

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External Links:

Look for Halotrichite on Webmineral

Look for Halotrichite on Wikipedia

Look for Halotrichite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for HalotrichiteHide

Reference List:

Sheveleva, R.M., Nazarova, M.A., Nuzhdaev, A.A., Zhegunov, P.S., Zhitova, E.S. (2023): Distribution and chemical composition of halotrichite in geothermal fields of Kamchatka. Vestnik Kamchatskoy regional'noy assotsiatsii «Uchebno-nauchnyy tsentr». Seriya: Nauki o Zemle, 58, 5-16.

forum.amiminerals.it (n.d.) http://forum.amiminerals.it/viewtopic.php?f=5&t=18787&sid=141a85641a65a1992d0e185f9f4058b9

Klaproth (1802) Beiträge zur Krystallographie und Mineralogie, Heidelberg: 3: 102 (as Federalaun vom Freyenwalde).

Glocker, E.F. (1839) 18. Halotrichit. in Grundrib der Mineralogie, mit Einschlub der Geognosie und Petrefactenkunde, Schrag (Nürnberg), 691-691. (as Halotrichit)

Forchhammer (1843) Jahresbericht über die Fortschritte der Chemie und verwandter Teile anderer Wissenschaften, 23. J. Ricker, F. Vieweg und Sohn. 263

Scacchi (1849) Mem. geol. camp. Nap.: 84 (as Halotrichine).

Linck G (1889) Beitrag zur Kenntniss der Sulfate von Terra amarilla bei Copiapó in Chile. Zeitschrift für Krystallographie und Mineralogie 15, 1-28

Uhlig (1912) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 723.

Larsen, Esper S. (1921) The microscopic determination of the nonopaque minerals. Bulletin Vol. 679. US Geological Survey doi:10.3133/b679 p.243

Schairer, J.F., Lawson, C.C. (1926) On pickeringite from Portland, Connecticut. American Journal of Science: s5-11: 301.

Doelter, C. (1927) Handbuch der Mineral-chemie: 4 [2]: 523, 545.

Vavrinecz (1929) Magyar Chemiai Folyóirat, Budapest: 35: 1.

Hintze, Carl (1930) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [3B]: 4505, 4512.

Kokta (1930) Příroda, Brno: 32: 381.

Rutherford, R.L. (1932) An occurrence of pickeringite in Alberta. American Mineralogist: 17: 401-403.

Tokody (1933) Földtani Közlöny, Budapest (Magyarhone Földtani Torsulat): 62: 187.

Lo Sardo (1937) Periodico de Mineralogia-Roma: 8: 281.

Meixner and Pillewizer (1937) Zbl. Min.: 263.

Bandy, Mark C. (1938) Mineralogy of three sulphate deposits of northern Chile. American Mineralogist, 23 (11) 669-760 p.724

Gordon (1942) Academy of Science Philadelphia, Not. Nat. no. 101.

Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.pp.523-527

Baur, G. S., Larsen, W. N., Sand, L. B. (1957) Image projection by fibrous minerals. American Mineralogist, 42 (9-10) 697-699

Cody, R.D., Biggs, D.L. (1973) Halotrichite, szomolnokite, and rozenite from Dolliver State Park, Iowa. The Canadian Mineralogist, 11, 958-970.

Zodrow, Erwin L., McCandlish, Keith (1978) Hydrated sulfates in the Sydney coalfield, Cape Breton, Nova Scotia. The Canadian Mineralogist, 16 (1) 17-22

Lovas, G.A. (1986) Structural study of halotrichite from Recsk (Mátra Mts., N-Hungary). Acta Geologica Hungarica, 29, 389-398.

Mihajlovic, T., Karanovic, L., Dimitrijevic, R. (2002) The crystal structure of halotrichite (Fe2+Al2(SO4)4·22H2O) from the mercury mine Šuplja Stena on Mt. Avala, Serbia. Jahrestagung der DGK, Kiel, Germany, March 4-7, 2002; abstract.

Mauro, D., Biagioni, C., Pasero, M., Skogby, H. (2019) Crystal-chemistry of sulfates From the Apuan Alps (Tuscany, Italy). III. Mg-rich sulfate assemblages from the Fornovolasco mining complex. Atti della Società Toscana di Scienze Naturali, Memorie, Serie A, 126, 33-44.

Zhitova, E. S., Sheveleva, R. M., Zolotarev, A. A., Krivovichev, S. V., Shilovskikh, V. V., Nuzhdaev, A. A., Nazarova, M. A. (2023) The crystal structure of magnesian halotrichite, (Fe,Mg)Al₂(SO₄)₄·22H₂O: hydrogen bonding, geometrical parameters and structural complexity. Journal of GEOsciences, 68 (2) 163-178

(2023) Halotrichite. Handbook of Mineralogy. Mineralogical Society of America

Localities for HalotrichiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Andorra
Ordino Llorts ⓘ Llorts Mine	Valenti Turu and Michels (1992)

Argentina
Catamarca Province Andalgalá Department ⓘ Capillitas mining district	Milka K. de Brodtkorb (2002)
ⓘ Bordón vein	MARQUEZ-ZAVALIA
Jujuy Province Santa Bárbara Department Cerros de Santa Bárbara El Palmar hot springs ⓘ Santa Bárbara sulphur mine	Zavalia et al. (1995)
Salta Province Los Andes department San Antonio de los Cobres ⓘ La Concordia mine	Brodtkorb (2002)
San Juan Province Calingasta Department Calingasta Quebrada Alcaparrosa ⓘ Santa Elena Mine	Rivista Minera Geol. y Min. +2 other references

Australia
New South Wales Clarke Co. ⓘ Gibsons Open Cut (Gibsons Mine)	B. G. Lottermoser: P. M. Ashley (1997)
Cumberland County Prospect ⓘ Prospect Quarry	Keith Compton collection
Gough Co. Strathbogie ⓘ Webbs Consols Mine (Webbs Consols)	Ashley et al. (1999)
Murchison Co. Upper Bingara Gulf Creek ⓘ Gulf Creek Mine (Gulf Creek Copper Mine)	Ashley et al. (1999)
Sandon Co. ⓘ Halls Peak	B. G. Lottermoser: P. M. Ashley (1997) +1 other reference
Yancowinna Co. Broken Hill district ⓘ Broken Hill
Queensland Charters Towers Region Charters Towers ⓘ Thalanga Mine	Thienenkamp (2004)
City of Mount Isa Mount Isa ⓘ Mount Isa Mines	Sielecki (1988)
ⓘ MIM underground - Upper lead-zinc levels (orebodies 4; 5; 6; 7; 8)	Sielecki (1985)
ⓘ Cloncurry Shire	Sielecki (1988)
Cloncurry ⓘ Lorena Gold Mine (Lorena Mine)	Anatoly Kasatkin analyses +1 other reference
South Australia Murray Basin Murray Riverlands ⓘ Lake Alexandrina	Rob Fitzpatrick
Olary Province Wadnaminga goldfield ⓘ New Milo Gold Mine	Pring et al. (1987)
Waukaringa ⓘ Waukaringa Mine
Pernatty Lagoon Mount Gunson Copper mines ⓘ Cattle Grid deposit	Pring et al. (1987)
Tasmania Hobart city Wellington Park ⓘ The Springs	Steve Sorrell Collection
Waratah-Wynyard municipality Waratah district Waratah ⓘ Mount Bischoff Mine	Bottrill +1 other reference
Victoria Macedon Ranges Shire Bullengarook ⓘ Mt Bullengarook	- (n.d.)
Western Australia East Pilbara Shire Weeli Wolli Creek Area Mining Area C ⓘ Area C mine	Jason Bennett Collection

Austria
Carinthia Sankt Veit an der Glan District Guttaring Waitschach ⓘ Slag localities	Neschen (n.d.)
Hüttenberg Sankt Martin am Silberberg ⓘ Slag localities	Neschen (n.d.)
ⓘ Metnitz	Niedermayr et al. (1995)
Wolfsberg District Reichenfels Mischlinggraben ⓘ Staubmann Mines	C.Auer (2013)
Lower Austria Horn District Brunn an der Wild Atzelsdorf ⓘ Marble quarry	Kolitsch et al. (2022)
Drosendorf-Zissersdorf Wollmersdorf (Zettlitz-Wollmersdorf) ⓘ Graphite quarry	Taucher (1993) +1 other reference
Krems-Land District ⓘ ~~Krumau am Kamp~~	Neschen (n.d.)
Mühldorf Amstall ⓘ Graphite quarry	Neschen (n.d.)
ⓘ Marble quarry (Thalinger quarry; Hausbruch)	Kolitsch et al. (2022)
ⓘ Weinberg Middle	Goldmann et al. (2008)
Rossatz-Arnsdorf Rossatz ⓘ Oberkienstock	Gerald Knobloch
Melk District Persenbeug-Gottsdorf ⓘ Loja	Neschen (n.d.)
Sankt Pölten-Land District Hafnerbach Hengstberg ⓘ Graphite deposit	Kolitsch et al. (2015)
Wölbling Hausheim ⓘ Lignite mine	Niedermayr (1987)
Salzburg Hallein District Hallein ⓘ Hallein - Bad Dürrnberg salt mine	Strasser (1989)
St. Johann im Pongau District Mühlbach am Hochkönig ⓘ Mitterberg mining district	Neschen (n.d.)
ⓘ Wolfbach valley	Strasser (1989)
Zell am See District Dienten am Hochkönig ⓘ Schwarzenbach	Exel (1993)
Rauris ⓘ Astenschmiede slag locality	Niedermayr et al. (2009)
Styria Leibnitz District Leutschach an der Weinstraße ⓘ Spitzmühle quarry	Taucher (1992) +1 other reference
Wildon Weitendorf ⓘ Basalt quarry	Neschen (n.d.)
Leoben District Kammern im Liesingtal Seiz Wolfsgruben (Wolfgruben) ⓘ Quartz quarry	WENINGER (1968)
Murau District Stadl-Predlitz ⓘ Turrach river (Turrach)	Schwaighofer et al. (1979)
Murtal District ⓘ Judenburg	Collection of NHM
Südoststeiermark District Bad Gleichenberg Bairisch Kölldorf ⓘ Schaufelgraben	Postl et al. (1996)
Voitsberg District Köflach Köflach - Voitsberg lignite deposit Zangtal ⓘ Muttlkogel	Neschen (n.d.) +1 other reference
Upper Austria Perg District Katsdorf ⓘ Nöbling sand pit	Erich Reiter et al. (1999)

Belgium
Wallonia Hainaut Bernissart Blaton ⓘ Mont-des-Groseillers	Mélon et al. (1976) +3 other references
Liège ⓘ Amay	Mélon et al. (1976) +1 other reference
ⓘ Ampsin	Mélon et al. (1976) +1 other reference
ⓘ Loyable	Hatert et al. (2002)
Chaudfontaine ⓘ La Rochette	Mélon et al. (1976) +2 other references
Engis ⓘ Engihoul-Antinne	Mélon et al. (1976) +1 other reference
ⓘ Flémalle	Mélon et al. (1976)
ⓘ Flémalle-Haute	Hatert et al. (2002)
ⓘ Chokier	Mélon et al. (1976) +1 other reference
Ivoz-Ramet ⓘ Ramioul	Mélon et al. (1976) +1 other reference
Liège Glain ⓘ Patience et Beaujonc coal dump	Van Tassel (1973) +2 other references
Trooz ⓘ Forêt	Hatert et al. (2002)
Visé ⓘ Argenteau	Mélon et al. (1976) +1 other reference
ⓘ Richelle	Mélon et al. (1976) +1 other reference
Namur Andenne Namêche ⓘ Samson	Hatert et al. (2002)

Bolivia
Oruro Cercado Province Oruro ⓘ San José Mine	Wilson (2001)
Potosí Rafael Bustillo Province Llallagua ⓘ Siglo Veinte Mine	Wilson (2001) +1 other reference
Tomás Frías Province Potosí (Potosí Municipality) ⓘ Cerro de Potosí (Cerro Rico)	Smith et al. (2001)

Bulgaria
Kardzhali Province Momchilgrad Municipality Obichnik ⓘ Obichnik Au-Ag deposit	Kunov et al. (1997)
Montana Province Chiprovtsi Municipality ⓘ Chiprovtsi deposit	Dimitrova +4 other references
Plovdiv Province Rodopi Municipality ⓘ KCM smelter slag locality	Atanassova et al. (2009)

Canada
British Columbia Kamloops Mining Division Cache Creek ⓘ Spatsum claim	Peatfield (n.d.) +1 other reference
Manitoba Sherridon District ⓘ Sherritt Gordon Mine (Sherridon Mine)	Geological Association of Canada (2014)
Newfoundland and Labrador Newfoundland Baie Verte Peninsula Tilt Cove ⓘ Tilt Cove Slag Locality ?	Norman Wilson personal collection
Nova Scotia Cape Breton Co. Sydney coalfield ⓘ Glace Bay	Zodrow et al. (1978)
#26 Colliery ⓘ 1-B mine	Palache et al. (1951)
Halifax Co. ⓘ Halifax slavikite occurrence	Ogilvie (1979)
Ontario Kenora District Drayton Township ⓘ North Pines Mine	Sabina (1991)
Québec Montérégie La Vallée-du-Richelieu RCM Mont Saint-Hilaire ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH)	166-175. +2 other references
Lajemmerais RCM Varennes & St-Amable ⓘ Saint-Amable sill	Horváth et al. (1998)
ⓘ Demix-Varennes quarry	Horváth et al. (1998)
Montréal ⓘ Francon quarry	Tarassoff et al. (2006)
Yukon Dawson mining district ⓘ Big Fish River	Robinson et al. (1992)
ⓘ Rapid Creek	150-152. +2 other references

Cape Verde
Sotavento Islands Fogo Island ⓘ Mount Fogo	Universidade de Evora +1 other reference

Chile
Antofagasta Antofagasta Province Mejillones Mejillones peninsula ⓘ Coronel Manuel Rodríguez mine	Some of the Sulphates has been ...
ⓘ Unnamed Cu mine [1]	Wet Chemical by Gerhard Möhn
Sierra Gorda ⓘ Alcaparrosa Mine	Kampf +5 other references
ⓘ La Compañia Mine	Samples analysed by Dr. Jochen Schluter
El Loa Province Calama Chuquicamata District ⓘ Chuquicamata Mine	Palache et al. (1951)
Toki Cu deposit (Toki Cluster) ⓘ Queténa Mine (Queténa Prospect)	Palache et al. (1951)
Arica y Parinacota Arica Province Los Camarones valley ⓘ Cuya	Kampf et al. (2013)
ⓘ Cuya NE9 sulfate occurrence	Kampf et al. (2013)
Atacama Copiapó Province ⓘ Tierra Amarilla	Handbook of Mineralogy (http://rruff.info/doclib/hom/halotrichite.pdf)
Tarapacá Tamarugal Province ⓘ Cerros Pintados	Peter G. Seroka collection

China
Gansu Baiyin Baiyin District Baiyinchang ore field Baiyinchang Cu deposit ⓘ Huoyanshan Mine	Bingbin Yang (1979)
ⓘ Zheyaoshan Mine	Bingbin Yang (1979)
Guizhou Qianxinan Xingren County ⓘ Lanmuchang Tl deposit	Zhao +6 other references
Inner Mongolia Bayannur City (Bayannao'er Prefecture) Urad Rear Banner (Wulate Houqi) ⓘ Tanyaokou Fe-Cu-Zn deposit	Zhaolong Li et al. (1981)
Qinghai Haixi Mongol and Tibetan Autonomous Prefecture Da Qaidam (Dachaidan Co.) Xitieshan ⓘ Xitieshan Mine	Guangzhi Tu et al. (1964)
Yunnan Baoshan Tengchong County ⓘ Rehai geothermal field	Meixiang et al. (1987)

Costa Rica
Alajuela Province San Carlos Canton Arenal Vulcano National Parc ⓘ Arenal Volcano	Stoiber et al. (1974)
Sarchí Canton ⓘ Poás Volcano	Rodríguez et al. (2017)
Cartago Province Oreamuno Canton Irazú Volcano ⓘ Cueva Los Minerales	Ulloa et al. (2018)

Cuba
Isla de la Juventud special municipality Isla de la Juventud (Isle of Pines; Island of Youth) ⓘ Rio del Callejon deposit	Zwahr et al. (1999)

Cyprus
Nicosia District ⓘ Sia	Ng +1 other reference

Czech Republic
Central Bohemian Region ⓘ Kladno District	Zacek et al. (1995)
ⓘ Otvovice ?	Ales Tomek photo
Prague-West District Hradištko ⓘ Mandát	Velebil
Rakovník District Pavlíkov Skřivaň ⓘ Valachov Hill	Palache et al. (1951)
Hradec Králové Region Trutnov District Radvanice ⓘ Kateřina Coal Mine	Jirásek (2001)
Karlovy Vary Region Cheb District Stará Voda ⓘ Dyleň	Fiala
Karlovy Vary District ⓘ Jáchymov	Lapis 2002 (7/8)
Svornost Mine ⓘ Geschieber vein ?	86. +1 other reference
Moravian-Silesian Region Karviná District Lázně Darkov ⓘ Darkov Mine (1 May mine)	Matýsek D.
Orlová ⓘ ČSA Mine	Matýsek D.
Lazy Mine ⓘ Dukla Mine	Matýsek D.
Nový Jičín District Štramberk ⓘ Limestone quarries	Jirásek et al. (2011)
Ostrava-City District Ostrava Odra Mine (after 1995) Ostrava Mine (after 1967) ⓘ Zárubek Mine (after 1954)	Vinš V. (1957)
Pardubice Region Pardubice District ⓘ Chvaletice	Prachař +6 other references
South Moravian Region Brno-Country District Čučice ⓘ Graphite mines	Houzar S.: Přehled minerálů z ...
Hodonín District Žádovice ⓘ Barbora I lignite mine	Kruťa T. (1944)
Ústí nad Labem Region Děčín District ⓘ Pravčice rock arch	Varilová et al. (2011)
Louny District Postoloprty Strkovice ⓘ Strkovice deposit	Filippi
Teplice District Bílina ⓘ Bílina coal mine	Bouška
Vysočina Region Žďár nad Sázavou District Bory ⓘ Dolní Bory	Staně +4 other references
ⓘ Pegmatite vein Oldřich	Staněk
Zlín Region Uherské Hradiště District Komňa ⓘ Bučník Hill Quarry	Roman Gramblička collection

Egypt


El Salvador
Sonsonate Department ⓘ Izalco Volcano	Stoiber et al. (1974)

Finland
North Savo Kuopio ⓘ Björkbakkagård	Arppe Finsk. Min. 1857 +1 other reference

France
Auvergne-Rhône-Alpes Haute-Loire Brioude Vieille-Brioude ⓘ Granite quarry	Pélisson (1989)
Brittany Côtes-d'Armor Saint-Brieuc Caurel ⓘ N164 By-pass	Pierre Le Roch
Finistère Châteaulin ⓘ Huelgoat	Lacroix (1910)
Poullaouen ⓘ La Vieille mine	R.PIERROT et al. (1973)
Locmaria-Berrien ⓘ Poullaba vein	R.PIERROT et al. (1973)
Scrignac ⓘ Kerizac	Chauris (2014)
Corsica Haute-Corse Corte Vezzani ⓘ Vezzani Mine	Lheur et al. (2011)
Grand Est Ardennes Charleville-Mézières ⓘ Anchamps	Vanrusselt (2023)
ⓘ Fumay	Nicu Pacanu collection
Hauts-de-France Pas-de-Calais Lens ⓘ Avion	Naze-Nancy Masalehdani et al. (2009)
Occitanie Aveyron Villefranche-de-Rouergue Decazeville Decazeville coal basin ⓘ Découverte de Lassalle	www.pangeaminerals.com (2005)
Gard Le Vigan Montdardier ⓘ Les Vieux Travaux mine	Gol et al. (2010)
ⓘ Les Malines District	Gol et al. (2010)
Pyrénées-Orientales Céret Argelès-sur-Mer ⓘ Château de Valmy	Berbain et al. (2005)
ⓘ Feldspar quarries (Mas de l'Abat)	Berbain et al. (2005)
Pays de la Loire Loire-Atlantique Nantes Nantes Chantenay ⓘ Miséri (Miséry) quarry	Baret (1905)
Saint-Nazaire Saint-Nazaire ⓘ Porcé	Baret (1905)
Provence-Alpes-Côte d'Azur Alpes-Maritimes Nice Saint-Sauveur-sur-Tinée ⓘ Saint-Sauveur (incl. Pointe de Campanier)	R. Pierrot
Hautes-Alpes Gap La Chapelle-en-Valgaudemar ⓘ Jas Roux	Bourgoin et al. (2011)

Germany
Baden-Württemberg Freiburg Region Breisgau-Hochschwarzwald Münstertal St Trudpert ⓘ Münstergrund Mine	Kleinander (2009)
Sulzburg ⓘ Holderpfad area	Brill (2017)
Ortenaukreis Haslach im Kinzigtal Steinach ⓘ Artenberg quarry	Hahn (1991)
Hausach Hausach ⓘ Erzengel Gabriel Mine (Gabriel Mine) ?	K. Walenta: Lapis 21 (12)
Oberwolfach ⓘ Clara Mine	Walenta (1992)
Seelbach Seelbach Weiler ⓘ Michael Mine	Wittern (2001)
ⓘ Schauinsland Pb-Zn mining district	Walenta (1992)
Bavaria Lower Bavaria Freyung-Grafenau District Röhrnbach ⓘ Steinerleinbach Quarry	Weiß (1990) +1 other reference
Passau District ⓘ Kropfmühl-Untergriesbach graphite mining district	Weiß (1990)
Regen District Bodenmais ⓘ Silberberg Mine	Obermüller et al. (1993)
Rinchnach Grub ⓘ Grub Quarry (incl. Ernst quarry; Kubischek quarry)	Obermüller (1992)
Upper Franconia Wunsiedel im Fichtelgebirge Arzberg ⓘ Arzberg iron mines ?	54. +1 other reference
Upper Palatinate Neustadt an der Waldnaab District Windischeschenbach ⓘ Oberbaumühle Quarry	Schwarzmeier (2015) +2 other references
Brandenburg Märkisch-Oderland Rüdersdorf bei Berlin ⓘ Limestone quarries	Jahn (2013)
Hesse Darmstadt Darmstadt-Dieburg Messel ⓘ Messel Mine	Aufschluss 1980 (6)
Darmstadt-Ost ⓘ Prinz von Hessen Mine	Aufschluss 1980 (6)
Kassel Region Hersfeld-Rotenburg Nentershausen Süß Richelsdorf Smelter ⓘ Ore dumps ?	Weiß (1990)
Schwalm-Eder Schwalmstadt Gusterhain ⓘ Wohlfarth Mine	Palache et al. (1951)
Lower Saxony Goslar District Goslar Rammelsberg ⓘ Rammelsberg Mine
North Rhine-Westphalia Arnsberg Herne Baukau ⓘ Julia coal mine	Weiß (1990)
Hochsauerlandkreis Arnsberg Müschede ⓘ Lanwehr quarry	found by Thomas Thieme
Märkischer Kreis Iserlohn Letmathe Helmke quarry nature reserve ⓘ Genna zinc smelter slag locality	Bender et al. (1994)
Olpe Lennestadt ⓘ Meggen Mine	Weiß (1990)
Cologne Aachen Alsdorf ⓘ Anna mine	Blaß et al. (1993)
Düsseldorf Essen Dellwig ⓘ Christian Levin coal mine	Weiß (1990)
Oberhausen Alstaden ⓘ Alstaden coal mine	Vertacnik (1983) +1 other reference
Münster Bottrop ⓘ Franz-Haniel Mine	Weiß (1990)
Recklinghausen Marl Hüls ⓘ Auguste Victoria coal mine	Weiß (1990)
Rhineland-Palatinate Donnersbergkreis Nordpfälzer Land Bayerfeld-Steckweiler ⓘ Roßwald Mine	Lapis 2001 (6)
Stahlberg ⓘ Erzengel Michael Mine (Erzengel Mine)	Ferber (1776)
Rhein-Lahn-Kreis Loreley Sankt Goarshausen Wellmich ⓘ Äquivalenz adit	Weiß (1990)
Saxony Bautzen District Oßling ⓘ Oßling Quarry	Wittern (2001)
Wittichenau ⓘ Dubring Quarry	Wittern (2001)
Dresden ⓘ Willi Agatz mine	Thalheim +1 other reference
Erzgebirgskreis Raschau-Markersbach Langenberg Graul Gottes Geschick Vereinigt Feld Mine ⓘ St Catharina Mine	www.dergraul.de (2001)
Görlitz District Quitzdorf am See Horscha ⓘ Pansberg quarry	86. +1 other reference
Mittelsachsen Brand-Erbisdorf ⓘ Himmelsfürst Mine	King (n.d.)
Oberschöna Bräunsdorf ⓘ Neue Hoffnung Gottes Mine	Naumann et al. (1898)
Sächsische Schweiz-Osterzgebirge Freital Döhlen ⓘ Carola Mine	Thalheim +1 other reference
Thuringia Greiz District Kauern ⓘ Lichtenberg Absetzer dump	T. Witzke & F. Rüger: Lapis 1998 (7/8)
Ronneburg ⓘ Lichtenberg open cast	T. Witzke & F. Rüger: Lapis 1998 (7/8)
Saalfeld-Rudolstadt District Lehesten ⓘ Slate quarries	Liebeskind et al. (1992)

Greece
Attica East Attica Lavreotiki Lavrion mining district Plaka Plaka Mines ⓘ Plaka Sulfate Locality	62 +3 other references
ⓘ Plaka Sulfate Locality II	Branko Rieck collection
Sounion Cato Sounio mines ⓘ Sounion Sulfate Locality	Branko Rieck collection
Eastern Macedonia and Thrace Evros Alexandroupoli Kirki Mines ⓘ Agios Philippos Mine	Triantafyllidis et al. (2007)

Hungary
Baranya County Komló District ⓘ Komló	ACTA MIN. PETR. Suppl. Tomus XXXVIII.
Pécs District ⓘ Pécs-Vasas	Szakáll et al. (2008)
Borsod-Abaúj-Zemplén County Gönc District ⓘ Telkibánya	ACTA MIN. PETR. Suppl. Tomus XXXVIII.
Kazincbarcika District Múcsony ⓘ Szeles Shaft	ACTA MIN. PETR. Suppl. Tomus XXXVIII.
ⓘ Ormosbánya	ACTA MIN. PETR. Suppl. Tomus XXXVIII.
Rudabánya ⓘ Vilmos Mine	Szakáll: Minerals of Rudabánya
Miskolc District ⓘ Lyukóbánya	ACTA MIN. PETR. Suppl. Tomus XXXVIII.
Fejér County Mór District ⓘ Pusztavám	Szakáll et al. (1996)
Heves County Eger District Egercsehi ⓘ Egercsehi Coal Mine	ACTA MIN. PETR. Suppl. Tomus XXXVIII.
Gyöngyös District Gyöngyösoroszi ⓘ Károlytáró	Szakáll-Gatter-Szendrei:Mineral ...
Mátraszentimre ⓘ Szent Imre Mine	Szakáll-Kristály-2018 +1 other reference
Parádfürdő ⓘ Egyesség Adit	Szakáll et al. (1996) +1 other reference
ⓘ Hegyes Hill	ACTA MIN. PETR. Suppl. Tomus XXXVIII.
ⓘ Hosszú-bérci Alum Quarry
Pétervására District Parádsasvár ⓘ Rudolftanya	ACTA MIN. PETR. Suppl. Tomus XXXVIII. +1 other reference
ⓘ Recsk	Tokody (1954)
ⓘ Lahóca Hill	ACTA MIN. PETR. Suppl. Tomus XXXVIII.
Komárom-Esztergom County Tatabánya ⓘ Coal mines	ACTA MIN. PETR. Suppl. Tomus XXXVIII.
ⓘ Tokodaltáró	Szakáll et al. (1996)
Nógrád County ⓘ Felsőpetény	ACTA MIN. PETR. Suppl. Tomus XXXVIII.
Keszeg ⓘ Sinkár Quarry
Pest County Szob District ⓘ Nagybörzsöny
ⓘ Alsó-Rózsa adit	Szakáll et al. (1996)
ⓘ Altáró
Veszprém County Tapolca District Lesenceistvánd ⓘ Scree Mine
Zala County Keszthely district Rezi ⓘ Kotyor brook	Szakáll et al. (1996)

Iceland
Capital Region Hafnarfjörður Krysuvik-Seltun geothermal area ⓘ Krisuvik hot spring	Palache et al. (1951)
Northeastern Region Þingeyjarsveit Skútustaðahreppur Myvatn ⓘ Krafla Volcano	Carson (2015)

Iran
West Azerbaijan Province ⓘ Urmia County	Palache et al. (1951)

Italy
Aosta Valley Saint-Marcel Servette-Chuc mining complex ⓘ Servette slag heaps	Neschen (n.d.)
Calabria Metropolitan City of Reggio Calabria San Lorenzo ⓘ Grana	Pailette (1842)
Campania Naples Pozzuoli ⓘ Antiniana (Scarfoglio)	Russo et al. (2017)
ⓘ Pisciarelli di Agnano	Russo et al. (2017)
ⓘ Solfatara di Pozzuoli	Palache et al. (1951)
ⓘ "Bocca Grande" fumarole	Russo et al. (2017)
Somma-Vesuvius Complex ⓘ Mount Vesuvius	Russo et al. (2004)
Torre del Greco ⓘ Vesuvius fumaroles at the crater bottom	Russo et al. (2004) +1 other reference
ⓘ Vesuvius fumaroles	Russo et al. (2004) +1 other reference
Emilia-Romagna Parma Province Berceto Corchia mine ⓘ Speranza Stope	Adorni F. (1997)
Piacenza Province Ferriere ⓘ Rocca Marsa	Neschen (n.d.)
Lazio Metropolitan City of Rome Capital Manziana ⓘ Solfatara di Manziana	Stoppani et al. (1982)
Sacrofano ⓘ Monte Solforoso	Del Caldo A. et al. (1973) +1 other reference
Liguria Genoa Sestri Levante ⓘ Libiola Mine	Carbone et al. (2002)
Savona Province Urbe ⓘ Faiallo Pass	Neschen (n.d.)
Piedmont Cuneo Province ⓘ Dronero	Piccoli et al. (2007)
Metropolitan City of Turin Chialamberto ⓘ Fragnè Mine	Piccoli et al. (2007)
Verbano-Cusio-Ossola Province Ornavasso ⓘ Migiandone Mine (Miggiandone)	C.M. Gramaccioli (1975)
ⓘ Verbania	Barelli (1835) +1 other reference
Sardinia South Sardinia Province Domusnovas ⓘ Perda Niedda Mine	Stara et al. (1996)
ⓘ Furtei	Fernando Caboni et al. (2024)
ⓘ Furtei mine	Fernando Caboni et al. (2024) +1 other reference
Sicily Metropolitan City of Messina Eolie Islands (Aeolian Islands) Lipari Vulcano Island Porto Levante Faraglioni di Levante Faraglione Nico ⓘ Grotta dell'Allume	P.Forti (1994)
ⓘ Faraglione Ranni	JERVIS G. (1873)
ⓘ Vulcanello	Jervis (1881)
Trentino-Alto Adige (Trentino-South Tyrol) South Tyrol Eisacktal (Valle Isarco) Brixen (Bressanone) ⓘ Albes (Albeins)	Exel (1987)
Villnöß (Funes) ⓘ Halotrichite occurrence	Hockauf (1887)
Trento Province (Trentino) Fornace ⓘ Quadrate	Andreatta C. (Trentino)
Levico Terme ⓘ Grotta del Vetriolo	Exel (1987)
Tuscany Grosseto Province Massa Marittima ⓘ Niccioleta Mine	Brizzi G. et al. (GR)
Scansano ⓘ Pereta Mine	Sitta et al. (1981)
Livorno Province Campiglia Marittima ⓘ Monte Valerio	Neschen (n.d.)
Piombino ⓘ Baratti slag locality	Neschen (n.d.)
Rio ⓘ Rio Marina	De Michele (1974)
ⓘ Rio Mine	F. Millosevich (1915)
Lucca Province Pietrasanta Valdicastello Carducci ⓘ Pollone Mine	Benvenuti M. et al. (Pb-Ag)
Stazzema Sant'Anna di Stazzema ⓘ Monte Arsiccio Mine	Biagioni et al. (2019) +1 other reference
Vergemoli ⓘ Fornovolasco	Mauro (2020)
ⓘ Cava del Ferro (Bùgie mines; Trimpello)	Biagioni et al. (2008) +1 other reference
Metropolitan City of Florence Gambassi Terme Podere Giuseppe ⓘ Cetine di Camporbiano Mine (Le Cetine; Cetine di Volterra; Cetine di Gambassi)	· Betti et al. (2017)
Siena Province Chiusdino ⓘ Le Cetine di Cotorniano Mine	Mineralogical Record (1) +1 other reference

Japan
Akita Prefecture Kazuno City ⓘ Osarizawa Mine	Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)

Kenya
Trans-Nzoia County Mount Elgon ⓘ Kitum Cave	Bowell et al. (1996)

Kyrgyzstan
Batken Region Kadamjay District ⓘ Chauvai (Chauvay) Sb-Hg Deposit	Kolesar et al. (1993)

Lebanon
South Governorate Jezzine District ⓘ Bhanine Valley	Kruszewski et al. (South Lebanon)

Mexico
Chihuahua Aquiles Serdán Municipality ⓘ Santa Eulalia Mining District	Prescott
Durango Cuencamé Municipality Velardeña District Velardeña ⓘ Santa María Mine	Am Min (1931) +1 other reference
Mapimí Municipality Mapimí ⓘ Ojuela Mine
Mexico Temascaltepec Municipality Temascaltepec de González (Temascaltepec) ⓘ Rosario Mine	Panczner (1987)
Sonora Santa Cruz Municipality Milpillas ⓘ Milpillas Mine	Jones et al. (2021)

Morocco
Marrakesh-Safi Region Marrakech Prefecture Bour Cercle ⓘ Kettara mine	Rachid Hakkou (2008)

Netherlands
ⓘ Limburg	T.G. Nijland
Kerkrade ⓘ Willem-Sophia mine	Mestrom (2023)

New Zealand
Auckland Region Kawau Island ⓘ Kawau Island Copper Mine	Collection of Rod Martin
Bay of Plenty Region ⓘ Whakaari (White Island)	Cody et al. (1979)
Waikato Region Taupo District Orakeikorako Thermal Area (Orakei Korako; The Hidden Valley) ⓘ Ruatapu Cave (Alum Cave)	Rod Martin et al. (NZ)
Wairakei ⓘ Lake Rotokawa	Collection of RJ Martin
Thames-Coromandel District Coromandel peninsula Whitianga ⓘ Whitianga Quarry	Sameshima (1986)

Nicaragua
León Department ⓘ Cerro Negro volcano	Stoiber et al. (1974)

Norway
Buskerud ⓘ Kongsberg silver mining district ?	Schumacher (1801) +1 other reference
Innlandet Lom Bøverdalen ⓘ Sulheim	Neumann (1985)
ⓘ Tessefaret	Kvamsdal (1990)
Sør-Fron ⓘ Tofte Farm	Caillere et al. (1968) +1 other reference
Nordland Fauske Øvervatnet ⓘ Storhelleren	Raade (1989)
Oslo Gamle Oslo ⓘ Konowsgate 1	Neumann (1985)
Telemark Skien Flakvarp Torsberg ⓘ Dragehullet	Larsen (1993)
Troms og Finnmark Balsfjord ⓘ Takvatnet Roadcut	Nordrum (2000)
Trøndelag Orkland Meldal Løkken Verk ⓘ Gammelgruva	Jørgensen et al. (2001)
Vestland Kvinnherad Ølve mining district ⓘ Attramadalen Mines (Atramdal)	Ellingsen (1989)
Stord Huglo Island ⓘ Tveit Mine

Pakistan
Khyber Pakhtunkhwa Province Nowshera District Jehangira ⓘ Khawrai (Khawari)	Niazi (2023)

Peru
Arequipa Caylloma Province Chivay District ⓘ Pinchollo geyser	Ciesielczuk et al. (2013)
Ayacucho Lucanas Province Huac-huas District ⓘ Javier Mine (Javier Ortega Mine)	Hyršl (2010) +1 other reference
Huancavelica Huancavelica Province Huachocolpa District ⓘ Coquito Mine	Pérez-Puig Obieta et al. (2013)

Poland
Lesser Poland Voivodeship Olkusz County Gmina Olkusz ⓘ Pomorzany Mine	Cabała et al. (2008)
Lower Silesian Voivodeship Kamienna Góra County Gmina Marciszów ⓘ Wieściszowice	Mochnacka et al. (2012)
ⓘ Colourful Lakelets	Balcerzak et al. (1992)
ⓘ Hoffnung Mine	Mochnacka et al. (2015)
Kłodzko County Nowa Ruda Słupiec Mine ⓘ Słupiec heap ?	Ciesielczukk
Silesian Voivodeship Wodzisław County Radlin ⓘ Marcel mine heap	Kruszewski et al. (2019)

Portugal
Aveiro Albergaria-a-Velha Branca ⓘ Palhal Mine	Marques de Sá et al. (2010)
Beja Aljustrel Aljustrel e Rio de Moinhos Aljustrel Mine ⓘ Algares deposit
ⓘ Moinho deposit	Rui Nunes
Mértola Corte do Pinto ⓘ São Domingos Mine	Rui Nunes collection +1 other reference

Romania
Alba County Roșia Montană ⓘ Roşia Montană	Onac (2003)
Caraş-Severin County Băile Herculane ⓘ Diana Cave	B. Onac et al (2009, July)
Harghita County ⓘ Bălan	Edited by Szakáll-Kristály (2010)
Cozmeni ⓘ Lăzăreşti	minerals-of-the-carpathians.eu (2008)
Hunedoara County Domogled - Cernei Valley National Park ⓘ Limestone caves	Onac (2009)
Maramureș County Baia Mare ⓘ Herja Mine	Own collect.
Săsar-Valea Roșie mining area ⓘ Săsar Mine	Rob Lavinsky
Băiuț ⓘ Breiner Mine (Brainer Mine; Breiner deposit)	A. Januszewska PXRD data / Januszewska et al. (in preparation)
ⓘ Johan Hell Mine	abstract. +3 other references

Russia
Chukotka Autonomous Okrug Anadyrsky District Tamvatnei massif ⓘ Tamvatnei Hg deposit	Pavel.M. Kartashov (n.d.)
Kamchatka Krai Ust-Bolsheretsky District ⓘ Verkhne–Koshelevsky geothermal field	Zhitova et al. (2023)
Yelizovsky District Kronotsky Reserve ⓘ Uzon Caldera	Active Volcanoes of Kamchatka
ⓘ Mutnovskoe	[Der Aufschluss 1995:4 p163-180] +1 other reference
ⓘ Mutnovsky volcano	www.kscnet.ru (2019)
ⓘ Dachnoe thermal field	Zhitova et al. (2022)
ⓘ Donnoe fumarole field	Zhitova et al. (2022)
Sakhalin Oblast Kuril Islands (Kurile Islands) Severo-Kurilsky District Paramushir Island ⓘ Ebeco Volcano (Ebeko Volcano)	Bortnikova et al. (2005)
Zabaykalsky Krai Kalarsky District Kodar–Udokan ore district Udokan ⓘ Udokan mine	Gongalsky et al. (2019)
Petrovsk-Zabaykalsky District ⓘ Bom-Gorkhon Mine	Eremin et al. (2014)

Senegal
Ziguinchor Region ⓘ Djiguinoum Valley	Montoroi (1995)

Serbia
Central Serbia Belgrade Voždovac Beli Potok Avala Mines ⓘ Šuplja Stena Mine	Jahrestagung der DGK et al. (2002)

Slovakia
Banská Bystrica Region Banská Štiavnica District ⓘ Banská Štiavnica
Revúca District Chyžné ⓘ Herichová	Bohuslav Burev collection
Nandraž ⓘ Elena Mine	Koděra (1986)
Žarnovica District Hodruša-Hámre Hodruša-Hámre mines ⓘ Rozália Mine	Martin Števko +1 other reference
Nová Baňa ⓘ Nová Baňa deposit	Koděra (1986)
Košice Region Gelnica District ⓘ Smolník	Duda
Prešov Region Prešov District Červenica Dubník ⓘ Libanka	Koděra (1986)
ⓘ Slávik adit	Koděra (1986)
Vranov nad Topľou District Komárany ⓘ Merník mercury deposit	Ďuďa

Slovenia
Idrija ⓘ Idria Mine (Idrija Mine)	Palache et al. (1951)

South Africa
KwaZulu-Natal eThekwini Metropolitan Municipality Durban Umhlatuzana valley ⓘ Clairwood quarries	Cairncross et al. (1995)
Westville ⓘ S. A. Crushers quarry	Cairncross et al. (1995)

Spain
Andalusia Almería Benahadux ⓘ La Partala Mines	Alonso et al. (Almería)
Cuevas del Almanzora Sierra Almagrera ⓘ Jaroso Ravine	Frost +4 other references
Níjar ⓘ Rodalquilar	Andreas Brand collection
ⓘ Filón 340	Sainz de Baranda Graf et al. (2023)
Huelva Minas de Riotinto Rio Tinto Mines ⓘ Alfredo pit	Calvo (1999)
Catalonia Barcelona Baix Llobregat Cervelló ⓘ Riera de Cervelló Mines	Joan Rosell (2022)
Gavà Bruguers ⓘ Elvira Mine (Rocabruna Mines)	Rafael Marin's Collection +1 other reference
Barcelonès Barcelona city Collserola mountain range ⓘ Santa Creu d'Olorda
Lleida Aran Valley Bausen ⓘ Sa Plan mines	Mata i Perelló (1990)
Extremadura Cáceres Tajo-Salor Aliseda ⓘ Pastora Mine	Crespo et al. (2017)
Galicia A Coruña Santiago de Compostela Aríns ⓘ Fornás Mine	Pascual +1 other reference

Sweden
Dalarna County Falun ⓘ Falun mine	Palache et al. (1951)

Switzerland
Fribourg Broye Estavayer Murist ⓘ La Molière Quarry	Stalder et al. (1998)
Grisons Bernina Region Poschiavo Bernina Pass area ⓘ Laguné Valley	Romani (2000)
ⓘ La Motta	Romani (2000)
Valais Saint-Maurice Salvan Les Marécottes La Creusaz ⓘ La Creusaz U prospect	Meisser (2012)
Sierre Anniviers Ayer ⓘ Gollyre Mine	Ansermet (2012)
Saint-Luc ⓘ Forêt du Rochet	Stalder et al. (1998)

Taiwan
Taipei City Beitou district ⓘ Beitou (Peitou; Hokuto springs)

Togo
Centrale Region Sotouboua Prefecture ⓘ Pagala prospect	Wolfgang Hampel

UK
England North Yorkshire Craven Ingleton ⓘ Mealbank Quarry ?	G Ryback
Scotland Renfrewshire ⓘ Paisley	Livingstone et al. (1983)
Wales Gwynedd Ganllwyd ⓘ Gwynfynydd Mine (Gwyn Mine; Morgan Mine; Mount Morgan Mine; British Gold Fields)
Isle of Anglesey Amlwch ⓘ Parys Mountain Mines
Merthyr Tydfil Treharris ⓘ Deep Navigation Colliery	Ian Jones or national Museum of Wales ...

Ukraine
Crimea Simferopol area Petropavlovka Village area ⓘ Petropavlovskii quarry	A. Tischenko. Minerals of the Crimea - ...

USA
Alabama Coosa County ⓘ Alum Bluff prospect	Cook et al. (1982)
Madison County ⓘ Alum Cave Hollow	Rocks & Min 70:5 pp 320-333
Arizona Cochise County ⓘ Bisbee	Anthony et al. (1995)
ⓘ Higgins Mine	Grant et al. (2005)
ⓘ Tombstone Mining District	Galbraith (1959)
Coconino County Cameron Mining District ⓘ Cameron	Bollin et al. (1958)
Huskon Mines (Huskon group) ⓘ Huskon No. 1 Mine (Charles Huskon #1)	Scarborough (1981)
ⓘ Huskon No. 10 Mine (Charles Huskon #10; Huskon #10)	Anthony et al. (1995)
ⓘ Yazzie No. 101 Mine	Scarborough (1981)
Orphan Mining District Grand Canyon Village ⓘ Orphan Mine (Orphan lode)	Anatoly Kasatkin analyses
Gila County Banner Mining District Hayden area Chilito ⓘ 79 Mine	Keith (1972)
Mohave County Hualapai Mountains Hualapai Mining District Pine Peak ⓘ Antler Mine (Spuyten Duyvel Mine)
Pinal County ⓘ Ray	Jones et al. (1983)
Scott Mountain ⓘ Ray Mine	Jones (1983)
Santa Cruz County Patagonia Mountains Harshaw Mining District Alum Gulch Flux Gulch ⓘ Flux Mine (Goshen Mine)	Museum Victoria specimen # M 36234
Palmetto Mining District ⓘ Denver Mine (El Toro Mine)	Bayliss et al. (1985) +1 other reference
Arkansas ⓘ Montgomery County	Jay Ellis Ransom
ⓘ White County	Howard (2007)
California Alameda County Livermore Mining District (Tesla District) Livermore ⓘ Eureka tunnel	Murdoch (1966)
Oakland Hills (San Leandro Hills) Oakland Leona Heights Leona Heights deposit ⓘ Alma Mine (Alma Pyrite Mine)	Anthony R. Kampf & FM Locality Index Committee (1989)
ⓘ Leona Mine (Leona Heights Mine)	[Mineralogical Record 20 129-142]
Alpine County Monitor - Mogul Mining District Leviathan Peak ⓘ Leviathan Mine	Rocks & Minerals: 16: 411. +6 other references
Contra Costa County Clayton Mount Diablo (Mt Diablo) ⓘ Mount Diablo Mine	Van Nostrand Reinholt Press: 264. +3 other references
ⓘ El Dorado County	Murdoch (1966)
Imperial County Niland ⓘ Davis–Schrimpf Fumarole Field (Mud Volcanoes area; Mud Pots area)	Adams et al. (2014)
Inyo County Coso Hot Springs ⓘ Coso Hot Springs deposit
ⓘ Coso Mine (Devil's Kitchen; Atlas; Lynch & Lynch; Nicol; Walley-Mickey & Wheeler)	www.mineralsocal.org
White Mountains ⓘ Pacific Coast Pyrophyllite Mine	Van Nostrand Reinholt Press: 264. +3 other references
Kern County Mojave-Rosamond Mining District (Mojave Mining District) Mojave Soledad Mountain (Butte Mountain) Soledad Mountain deposit Soledad Mountain project (Victory) ⓘ Golden Queen Mine	Van Nostrand Reinholt Press: 264. +1 other reference
Los Angeles County ⓘ Cahuenga Peak	Van Nostrand Reinholt Press: 264 +4 other references
ⓘ Neuerburg Locality 10	Neuerberg (1951)
Merced County Stayton Mining District (McLeod Mining District; Panoche Mining District) Antimony Peak ⓘ Stayton Mine (Stayton Quicksilver Mine; Pacific claim of Stayton group)	Van Nostrand Reinholt Press: 264 +2 other references
Mono County White Mountains White Mountain Peak ⓘ Champion Mine	...
San Benito County Stayton Mining District (McLeod Mining District; Panoche Mining District) Santa Ana Mountain ⓘ Yellow Jacket Mine	Min.Rec.: 20:429-432
San Bernardino County Calico Mts (Calico Hills) Calico District (Daggett District; Calico-Daggett area) Calico ⓘ Sulphur Hole (Sulfur Hole; Sulphur pit)	part 2 +4 other references
Silver Lake Mining District Soda Mountains Zzyzx ⓘ Blue Bell Mine	Thorne (n.d.)
San Diego County Lakeside ⓘ El Capitan Quarry	SDSU Geology Department unpublished ...
Shasta County Klamath Mountains West Shasta Copper - Zinc Mining District Iron Mountain [town] Iron Mountain ⓘ Iron Mountain Mine (Number 8; Confidence; Old Mine)	Nordstrom et al. (1999) +1 other reference
Lassen Volcanic National Park ⓘ Lassen Peak	…Volcano Letter o. 293: 1-3 1930: 118 +4 other references
Sonoma County West Mayacmas Mining District ⓘ The Geysers	Van Nostrand Reinholt Press: 264 +3 other references
Trinity County Coastal Range Island Mountain Moose Peak ⓘ Island Mountain Mine (Dahrman group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun)	Van Nostrand Reinholt Press: 228. +1 other reference
Colorado Boulder County ⓘ Marshall	Eckel et al. (1997)
ⓘ White Rock	Eckel et al. (1997)
Dolores County ⓘ Lone Cone Mining District (Dunton Mining District)	Eckel et al. (1997)
ⓘ Emma Mine (Barbara; Normandic; Brooklyn; MS 18498; Sirius; MS 12931; Cynthia; Orion; MS 12953a; Modern Mines)	Eckel et al. (1997)
Eagle County Gilman Mining District (Battle Mountain Mining District; Red Cliff Mining District) Gilman ⓘ Eagle Mine	Eckel et al. (1997)
Jefferson County Foothill Mining District ⓘ US Highway 285 roadcut	Eckel et al. (1997)
Mineral County Creede Mining District ⓘ Emperius Mine	Eckel et al. (1997)
Otero County ⓘ Fowler	Eckel et al. (1997)
Ouray County ⓘ Brown Mountain	Eckel et al. (1997)
Gray Copper Gulch ⓘ Indiana Mine	Eckel et al. (1997)
Pitkin County Columbia Mining District (Ashcroft Mining District) ⓘ Unnamed iron deposit	Eckel et al. (1997)
San Miguel County Slick Rock Mining District ⓘ Veta Mad Mine	In the collection of Alex Earl
Connecticut Litchfield County Harwinton ⓘ Pegmatite quarry and ultramafic rock ?	Yale Peabody Museum collection
ⓘ Death Valley National Park	David Eicher photo
Georgia Rabun County ⓘ Rabun Gap	Cook (1978)
Hawaii Hawaii County ⓘ Kilauea Volcano	Jesse Crawford specimen
ⓘ Unspecifed lava tubes (lava caves)	Hon
Iowa ⓘ Appanoose County	Paul J. Horick (1974)
ⓘ Mahaska County	Paul J. Horick (1974)
ⓘ Marion County	Paul J. Horick (1974)
ⓘ Monroe County	Paul J. Horick (1974)
ⓘ Van Buren County	Paul J. Horick (1974)
Kentucky Jefferson County ⓘ Southwestern Jefferson County	Goldstein (2006)
Lincoln County ⓘ Black Shales	Goldstein (2006)
Halls Gap ⓘ US highway 27 roadcut	Mineralogical Record +1 other reference
Nelson County Bardstown ⓘ KY 245 roadcuts (1)	Goldstein (2006)
Pulaski County ⓘ Black shales	Goldstein (2006)
Massachusetts Norfolk County ⓘ Braintree	Gleba (2008)
ⓘ Quincy	Gleba (2008)
Michigan Iron County Mineral Hills ⓘ Homer-Wauseca Group	Morris Jr. (1983)
Missouri Boone County ⓘ Finger Lakes State Park	Sherwood et al. (1998)
Macon County ⓘ Bee-Veer mine	Sherwood et al. (1998)
Monroe County ⓘ Paris	Sherwood et al. (1998)
ⓘ Randolph County	Sherwood et al. (1998)
Nebraska Dixon County ⓘ Volcano Hill	R.M. Joeckel et al. (2011)
Lancaster County ⓘ Denton	The Minerals and Gemstones of Nebraska ...
Nemaha County Brownville ⓘ Indian Cave Sandstone	Robert Matthew Joeckel et al. (2007)
ⓘ Pony Creek Shale	The Minerals and Gemstones of Nebraska ...
Otoe County ⓘ Willard formation	Robert Matthew Joeckel et al. (2007)
Pawnee County ⓘ Du Bois	The Minerals and Gemstones of Nebraska ...
ⓘ White Cloud formation	Robert Matthew Joeckel et al. (2007)
Saunders County ⓘ Valparaiso	The Minerals and Gemstones of Nebraska ...
Nevada Elko County Bootstrap Mining District ⓘ Meikle Mine	Jensen (1999) +1 other reference
Esmeralda County Goldfield Mining District ⓘ Combination Mine	Castor et al. (2004)
Goldfield ⓘ Red Top Mine	Castor et al. (2004)
ⓘ January mine	Castor et al. (2004)
ⓘ Sweeney lease	Castor et al. (2004)
Eureka County Carlin Trend Maggie Creek Mining Subdistrict ⓘ Gold Quarry Mine	Jensen et al. (1995)
Humboldt County Osgood Mountains Potosi Mining District Adam Peak Getchell Mine ⓘ Summer Camp pit	Bowell et al. (2005)
Storey County ⓘ Comstock Mining District	Castor et al. (2004)
Washoe County ⓘ Peavine Mining District	Castor et al. (2004)
New Hampshire Grafton County Campton ⓘ Beebe River "Gold" mine	Mortimer (2007)
Hillsborough County Wilton ⓘ Wilton Crushed Stone Quarry	P. Cristofono collection 2011
Rockingham County Newington Great Bay National Wildlife Refuge ⓘ National Refuge borehole (NR1)	Nora K. Foley et al. (2006)
New Jersey Sussex County Ogdensburg Sterling Hill ⓘ Sterling Mine	Dunn (1995)
New Mexico Grant County ⓘ Alum Mountain Mining District (Alum Mining District)	Northrop et al. (1996) +1 other reference
ⓘ Alunogen No. 2 Tunnel	USGS Bull 1451
McKinley County ⓘ Becenti Mine	NEW MEXICO GEOLOGY November 2004
Rio Arriba County ⓘ Abiquiu District	Northrop et al. (1996)
Santa Fe County ⓘ La Bajada Mining District	Northrop et al. (1996)
Taos County Cabresto Creek ⓘ Cabresto Lake prospect	New Mexico Bureau of Geology Mineral ...
ⓘ North Carolina
Swain County ⓘ Great Smoky Mountains	Mineralogical Record March - April 2000
ⓘ Road to Nowhere (Lakeview Drive)	Environmental Geology: 45: 47. +1 other reference
Ohio Huron County Huron River ⓘ Huron Shale burn site	Richards et al. (2017)
Monroeville West Branch Huron River ⓘ Blue Bridge	Carlson (2015)
Ross County Paxton Township ⓘ Copperas Mountain	Carlson (2015)
Vinton County Brown township Sandy Run ⓘ Abandoned coal strip mines	Carlson (2015)
Oregon Lake County Lakeview ⓘ White King Mine	Rod Martin Collection
Pennsylvania Centre County State College Skytop ⓘ Interstate 99 Skytop roadcut	U.S. Geological Survey/ U.s. Department ...
Montgomery County Lower Merion Township Pencoyd (West Manayunk) ⓘ Rock Hill Road	Mineralogy of Pennsylvania-1922 +1 other reference
Philadelphia County Philadelphia ⓘ Fairmount Park	Gordon
East Falls ⓘ Ridge Avenue and School Lane Quarries	Gordon
ⓘ Falls of Schuylkill	Ref.: Gordon (1922)
ⓘ Wissahickon Valley	Gordon
Union County Winfield ⓘ Faylor-Middle Creek Quarry	Geyer
South Dakota Pennington County Mystic ⓘ Burlington Railroad tunnel	Roberts et al. (1965)
Tennessee Monroe County Tellico Plains ⓘ Unnamed sulphate locality	Paris (2011)
Sevier County ⓘ Alum Cave Bluff	Flohr et al. (1995) +1 other reference
Texas El Paso County El Paso Franklin Mountains (Franklin Range) ⓘ Tom Mays Park Copper deposit	Smith (1991)
Utah Emery County Calf Mesa Mining District ⓘ Dexter group	Bullock (1981)
ⓘ Dexter No. 7 Mine	Min Rec 19:331-338 +1 other reference
ⓘ San Rafael River Mining District	Young et al. (1960)
ⓘ Temple Mountain Mining District	DANA R. KELLEY AND PAUL F. KERR (1958)
ⓘ North Mesa Mine Group	EDS Analyzed by Joy Desor +1 other reference
ⓘ North Mesa 10 Mine	Collected by and in the collection of ...
ⓘ North Mesa Mine	Collected by and in the collection of ...
Piute County Marysvale Mining District ⓘ Freedom No. 2 Mine	Excalibur Mineral Co. microprobe ... +1 other reference
San Juan County Red Canyon Mining District ⓘ Blue Lizard Mine	Plášil et al. (2013)
ⓘ Giveway-Simplot Mine	Travis Olds collection
ⓘ Joe Bishop Mine	Patrick Haynes. IDs by the late Howard ...
ⓘ Markey Mine
ⓘ Posey Mine	Min News 5:10 p1-5 +1 other reference
White Canyon Mining District ⓘ Happy Jack Mine (Blue Dike Mine)	USGS: Geological Survey Circular 217
Uintah County ⓘ Uteland Knoll Mining District (Ouray Mining District)	Bullock (1981)
ⓘ Ouray	Contributions to Economic Geology
Utah County East Tintic Mining District Dividend Tintic Standard Mine ⓘ Tintic Standard No. 2 Shaft	Bullock (1981)
Vermont Orange County Strafford South Strafford ⓘ Elizabeth Mine	... +1 other reference
Windham County Westminster ⓘ Quarry Road quarry	Robinson (1996)
Virginia Carroll County Southern Section-Blue Ridge Province ⓘ Gossan Lead Mining District	Dietrich (1990)
Louisa County Gold-Pyrite Belt Mineral ⓘ Sulphur Mine (Crenshaw Mine; Victoria Furnace Mine)	Dietrich (1990)
Wise County Big Stone Gap ⓘ Roadcut	Dietrich (1990)
ⓘ Roadcut (2)	Dietrich (1990)
ⓘ Unnamed coal mines	Dietrich (1990)
Washington Chelan County Railroad Creek Mining District ⓘ Holden Mine	Kilburn et al. (1996)
Wisconsin Rusk County Ladysmith-Rhinelander Metavolcanic Complex Ladysmith ⓘ Flambeau Mine	wgnhs.uwex.edu (n.d.)

Uzbekistan
Ferghana Region Uzbekistan District ⓘ Shorsu deposit (Shor-Su deposit)	Uklonskiy et al. (1964) +2 other references

Halotrichite

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