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Goldichite

A valid IMA mineral species - grandfathered
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05869660017075944509499.jpg
Goldichite

Javier Mine, Huac-huas District, Lucanas Province, Ayacucho, Peru
02153250014972223943716.jpg
Goldichite

Solfatara di Pozzuoli, Pozzuoli, Naples, Campania, Italy
06186970017073439522836.jpg
Goldichite

Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy
01064640017056182699450.jpg
Goldichite

Javier Mine, Huac-huas District, Lucanas Province, Ayacucho, Peru
04179100014971850563787.jpg
Goldichite

Solfatara di Pozzuoli, Pozzuoli, Naples, Campania, Italy
09277860017056076127993.jpg
Goldichite

Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy
05869660017075944509499.jpg
Goldichite

Javier Mine, Huac-huas District, Lucanas Province, Ayacucho, Peru
04469710014972150619545.jpg
Goldichite

Solfatara di Pozzuoli, Pozzuoli, Naples, Campania, Italy
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About GoldichiteHide

04852330014946642374874.jpg
Samuel Stephen Goldich
Formula:
KFe(SO4)2 · 4H2O
Colour:
Pale yellowish green
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
2.43
Crystal System:
Monoclinic
Name:
Named in 1955 by Abraham Rosenzweig and Eugene B. Gross in honor of Dr. Samuel Stephen Goldich ["January", 1909 USA - December 20, 2000 Applewood, Colorado, USA], American mineralogist, University of Minnesota and founding chief of the USGS Branch of Isotope Geology. The Goldich Stability Series was devised by him.
This page provides mineralogical data about Goldichite.


Unique IdentifiersHide

Mindat ID:
1722
Long-form identifier:
mindat:1:1:1722:6
GUID
(UUID V4):
22cf999d-347e-468e-8e6d-cc1449cdc97e

IMA Classification of GoldichiteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
KFe3+(SO4)2 · 4H2O
First published:
1955
Type description reference:
Rosenzweig, A., Gross, E.B. (1955) Goldichite, a new hydrous potassium ferric sulfate from the San Rafael Swell, Utah. American Mineralogist: 40: 469-480.

Classification of GoldichiteHide

Strunz-mindat (2024):
7.CC.40

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
Dana 8th ed.:
29.5.2.1

29 : HYDRATED ACID AND NORMAL SULFATES
5 : AB(XO4)2·xH2O
Hey's CIM Ref.:
25.11.8

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.

SymbolSourceReference
GolIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of GoldichiteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Pale yellowish green
Comment:
Lavender tint in artificial light.
Streak:
White
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {100}
Density:
2.43 g/cm3 (Measured)    2.461 g/cm3 (Calculated)

Optical Data of GoldichiteHide

Type:
Biaxial (+)
RI values:
nα = 1.582 - 1.584 nβ = 1.602(2) nγ = 1.629 - 1.639
2V:
Measured: 82° , Calculated: 75° to 82°
Max Birefringence:
δ = 0.047 - 0.055
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong
Optical Extinction:
X = b; Y ≃ a; Z ∧ c = 9°–11°.
Pleochroism:
Weak
Comments:
X= colorless
Y= colorless to pale yellow
Z= very pale yellow

Chemistry of GoldichiteHide

Mindat Formula:
KFe(SO4)2 · 4H2O
Elements listed:
Fe, H, K, O, S - search for minerals with similar chemistry

Crystallography of GoldichiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 10.387(6) Å, b = 10.486(6) Å, c = 9.086(5) Å
β = 101.68(7)°
Ratio:
a:b:c = 0.991 : 1 : 0.866
Unit Cell V:
969.14 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Flattened on {100} and elongated along [001] with forms {100}, {110}, and
{011}.

Crystallographic forms of GoldichiteHide

Crystal Atlas:
Image Loading
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Goldichite - {100}, {110}, {011},
3d models and HTML5 code kindly provided by www.smorf.nl.

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Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000264GoldichiteGraeber E J, Rosenzweig A (1971) The crystal structures of yavapaiite, KFe(SO4)2, and goldichite, KFe(SO4)2.4H2O American Mineralogist 56 1917-193319710293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.068 Å(100)
7.35 Å(90)
10.29 Å(80)
6.85 Å(70)
4.00 Å(60)
3.403 Å(60)
2.656 Å(60)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
45a : [Sulfates, arsenates, selenates, antimonates]
47a : [Near-surface hydration of prior minerals]
47b : [Sulfates and sulfites]
Stage 10b: Anthropogenic minerals<10 Ka
55 : Anthropogenic mine minerals
Geological Setting:
Oxidation of pyrite, rarely fumaroles.

Type Occurrence of GoldichiteHide

Type Locality:
ⓘ Dexter No. 7 Mine, Calf Mesa Mining District, Emery County, Utah, USA
General Appearance of Type Material:
Radiating clusters of pale-green crystals or fine-grained crystalline encrustations.
Place of Conservation of Type Material:
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 106903.
Geological Setting of Type Material:
Cementing material of a talus slope below a small, pyrite-rich uranium deposit.
Associated Minerals at Type Locality:
CoquimbiteHalotrichiteRömeriteAlunogenCopiapite
FibroferriteMelanteriteVoltaiteButleriteParabutlerite
ChalcanthiteDiadochite
Reference:
Rosenzweig, A., Gross, E.B. (1955) Goldichite, a new hydrous potassium ferric sulfate from the San Rafael Swell, Utah. American Mineralogist: 40: 469-480.
Download:
https://rruff.info/rruff_1.0/uploads/AM40_469.pdf

Other Language Names for GoldichiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
29 photos of Goldichite associated with CoquimbiteAlFe3(SO4)6(H2O)12 · 6H2O
16 photos of Goldichite associated with RömeriteFe2+Fe3+2(SO4)4 · 14H2O
10 photos of Goldichite associated with HalotrichiteFeAl2(SO4)4 · 22H2O
9 photos of Goldichite associated with VoltaiteK2Fe2+5Fe3+3Al(SO4)12 · 18H2O
4 photos of Goldichite associated with FerricopiapiteFe3+0.67Fe3+4(SO4)6(OH)2 · 20H2O
3 photos of Goldichite associated with KrausiteKFe(SO4)2 · H2O
2 photos of Goldichite associated with CopiapiteFe2+Fe3+4(SO4)6(OH)2 · 20H2O
1 photo of Goldichite associated with PickeringiteMgAl2(SO4)4 · 22H2O
1 photo of Goldichite associated with MelanteriteFe2+(H2O)6SO4 · H2O

Related Minerals - Strunz-mindat GroupingHide

7.CC.CobaltoblöditeNa2Co(SO4)2 · 4H2OMon. 2/m : P21/b
7.CC.AndychristyitePbCu2+Te6+O5(H2O)Tric. 1 : P1
7.CC.Ammoniovoltaite(NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18Iso. m3m (4/m 3 2/m) : Fd3c
7.CC.05KrausiteKFe(SO4)2 · H2OMon. 2/m : P21/m
7.CC.10TamarugiteNaAl(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.15KaliniteKAl(SO4)2 · 11H2OMon. 2/m : B2/b
7.CC.15MendoziteNaAl(SO4)2 · 11H2OMon. 2/m : B2/b
7.CC.20Lonecreekite(NH4)Fe3+(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.20Alum-(K)KAl(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.20Alum-(Na)NaAl(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.20Tschermigite(NH4)Al(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.20LanmuchangiteTl+Al(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.25VoltaiteK2Fe2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.25ZincovoltaiteK2Zn5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.25PertlikiteK2(Fe2+,Mg)2Mg4Fe3+2Al(SO4)12 · 18H2OTet. 4/mmm (4/m 2/m 2/m) : I41/acd
7.CC.25Ammoniomagnesiovoltaite(NH4)2Mg2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.25MagnesiovoltaiteK2Mg5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.30KröhnkiteNa2Cu(SO4)2 · 2H2OMon. 2/m : P21/b
7.CC.35FerrinatriteNa3Fe(SO4)3 · 3H2OTrig. 3 : P3
7.CC.45LöweiteNa12Mg7(SO4)13 · 15H2OTrig. 3 : R3
7.CC.50BlöditeNa2Mg(SO4)2 · 4H2OMon. 2/m : P21/b
7.CC.50NickelblöditeNa2(Ni,Mg)(SO4)2 · 4H2OMon. 2/m : P21/b
7.CC.50ChangoiteNa2Zn(SO4)2 · 4H2OMon. 2/m : P21/b
7.CC.55LeoniteK2Mg(SO4)2 · 4H2OMon. 2/m : B2/m
7.CC.55MereiteriteK2Fe(SO4)2 · 4H2OMon. 2/m : B2/m
7.CC.60Boussingaultite(NH4)2Mg(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60CyanochroiteK2Cu(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60Mohrite(NH4)2Fe(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60Nickelboussingaultite(NH4)2Ni(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60PicromeriteK2Mg(SO4)2 · 6H2OMon. 2/m : P2/b
7.CC.60NickelpicromeriteK2Ni(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60Katerinopoulosite(NH4)2Zn(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.65PolyhaliteK2Ca2Mg(SO4)4 · 2H2OTric. 1
7.CC.70LeightoniteK2Ca2Cu(SO4)4 · 2H2OMon. 2/m : B2/b
7.CC.75AmarilliteNaFe(SO4)2 · 6H2OMon. 2/m : B2/b
7.CC.80KonyaiteNa2Mg(SO4)2 · 5H2OMon. 2/m : P21/b
7.CC.85WattevilleiteNa2Ca(SO4)2 · 4H2O (?)Orth.
7.CC.85XocolatliteCa2Mn4+2(Te6+O6)2 · H2OMon. 2/m : P2/m
7.CC.90Eckhardite(Ca,Pb)Cu2+Te6+O5(H2O)Mon. 2/m

Other InformationHide

Notes:
Slightly soluble in cold water. Soluble in hot water with hydrolysis.
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 GoldichiteHide

References for GoldichiteHide

Localities for GoldichiteHide

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.
Argentina
 
  • Jujuy Province
    • Santa Bárbara Department
      • Cerros de Santa Bárbara
        • El Palmar hot springs
rruff.geo.arizona.edu (n.d.) +1 other reference
Canada
 
  • Ontario
    • Greater Sudbury
      • McKim Township
Schindler et al. (2012)
Chile
 
  • Antofagasta
    • Antofagasta Province
      • Sierra Gorda
Samples analysed by Tony Kampf of LAC ...
  • Tarapacá
    • Tamarugal Province
Peter G. Seroka collection
China
 
  • Anhui
Cai et al. (2009)
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion mining district
          • Plaka
            • Plaka Mines
Kolitsch et al. (2014)
Branko Rieck collection
          • Sounion
            • Cato Sounio mines
Branko Rieck collection
Italy
 
  • Campania
    • Naples
      • Pozzuoli
De Michele (1974)
  • Tuscany
    • Lucca Province
      • Stazzema
        • Sant'Anna di Stazzema
Biagioni et al. (2019) +1 other reference
Netherlands
 
  • Caribbean Netherlands
Anthony et al. (2016)
Peru
 
  • Ayacucho
    • Lucanas Province
      • Huac-huas District
Roth et al. (2012)
Portugal
 
  • Azores
    • São Miguel
      • Povoação
        • Furnas
Flahaut et al. (2018, September)
Russia
 
  • Sakhalin Oblast
    • Kuril Islands (Kurile Islands)
      • Kurilsky District
        • Iturup Island
maurice.strahlen.org (2004)
USA
 
  • Utah
    • Emery County
      • Calf Mesa Mining District
Bullock (1981)
The Mineralogical Record: 19: 331-338. +1 other reference
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