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Krauskopfite

A valid IMA mineral species

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Photos of Krauskopfite (13)

Krauskopfite Gallery Search Photos of Krauskopfite

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Krauskopfite

Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA

Krauskopfite

Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA

Krauskopfite

Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA

Krauskopfite

Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA

Krauskopfite

Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA

Krauskopfite

Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA

Krauskopfite

Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA

Krauskopfite

Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA

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About KrauskopfiteHide

Konrad B. Krauskopf

Formula:

BaSi₂O₅ · 3H₂O

Colour:

White to colourless

Lustre:

Sub-Vitreous, Pearly

Hardness:

Specific Gravity:

3.14

Crystal System:

Monoclinic

Name:

Named in honour of Konrad Bates Krauskopf (November 30, 1910 – May 4, 2003), professor of geochemistry at Stanford University and noted for his work in radioactive waste disposal.

Type Locality:

ⓘ Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA

This page provides mineralogical data about Krauskopfite.

Unique IdentifiersHide

Mindat ID:

2271

Long-form identifier:

mindat:1:1:2271:8

GUID
(UUID V4):

09d517e2-16e4-41dd-8280-a3a20970f28e

IMA Classification of KrauskopfiteHide

IMA status:

Approved

First published:

1965

Type description reference:

Alfors, John T., Stinson, Melvin C., Matthews, Robert A., Pabst, Adolf (1965) Seven new barium minerals from eastern Fresno County, California. American Mineralogist, 50 (3-4) 314-340

Classification of KrauskopfiteHide

Strunz-mindat (2024):

9.DH.30

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si₄O₁₂

Dana 8th ed.:

74.3.4.2

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips

Hey's CIM Ref.:

14.7.2

14 : Silicates not Containing Aluminum
7 : Silicates of Ba, Sr and Zn

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

Physical Properties of KrauskopfiteHide

Lustre:

Sub-Vitreous, Pearly

Transparency:

Transparent, Translucent

Comment:

Pearly on cleavages

Colour:

White to colourless

Streak:

White

Hardness:

4 on Mohs scale

Cleavage:

Perfect
Perfect on {010} and {001} intersecting at 90°, with a third poor cleavage at a high angle to the other two.

Density:

3.14(2) g/cm³ (Measured) 3.10 g/cm³ (Calculated)

Optical Data of KrauskopfiteHide

Type:

Biaxial (-)

RI values:

n_α = 1.574(2) n_β = 1.587(2) n_γ = 1.599(2)

2V:

Measured: 88° (5), Calculated: 87°

Max Birefringence:

δ = 0.025

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

Surface Relief:

Moderate

Dispersion:

relatively weak

Optical Extinction:

X = b; Y ∧ a = 6°; Z ∧ c = 10.5°. a ∧ c = 94° 32' +/- 8'.

Chemistry of KrauskopfiteHide

Mindat Formula:

BaSi₂O₅ · 3H₂O

Elements listed:

Ba, H, O, Si - search for minerals with similar chemistry

Common Impurities:

Ti,Al,Fe,Mn,Mg,Ca,Sr,K

Crystallography of KrauskopfiteHide

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Space Group:

P2₁/b

Setting:

P2₁/a

Cell Parameters:

a = 8.460(5) Å, b = 10.622(6) Å, c = 7.837(4) Å
β = 94.53(1)°

Ratio:

a:b:c = 0.796 : 1 : 0.738

Unit Cell V:

702.05 Å³ (Calculated from Unit Cell)

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)
0012050	Krauskopfite	Coda A, dal Negro A, Rossi G (1967) The crystal structure of krauskopfite Atti della Accademia Nazionale dei Lincei 42 859-873		1967	Rush Creek locality, Fresno County, California	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Krauskopfite'
loop_
_publ_author_name
'Coda A'
'dal Negro A'
'Rossi G'
_journal_name_full 'Atti della Accademia Nazionale dei Lincei'
_journal_volume 42 
_journal_year 1967
_journal_page_first 859
_journal_page_last 873
_publ_section_title
;
 The crystal structure of krauskopfite
;
_database_code_amcsd 0012050
_chemical_compound_source 'Rush Creek locality, Fresno County, California'
_chemical_formula_sum 'Ba Si2 O8 H6'
_cell_length_a 7.837
_cell_length_b 10.622
_cell_length_c 8.460
_cell_angle_alpha 90
_cell_angle_beta 94.53
_cell_angle_gamma 90
_cell_volume 702.049
_exptl_crystal_density_diffrn      3.099
_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_U_iso_or_equiv
Ba   0.20617   0.14932   0.12217 ?
Si1   0.49067   0.38317   0.27346 ?
Si2   0.70113   0.24619   0.53086 ?
O1   0.53510   0.28850   0.12730 ?
O2   0.52050   0.52750   0.21820 ?
O3   0.30710   0.34940   0.31900 ?
O4   0.64070   0.36760   0.41750 ?
O5   0.76590   0.12990   0.43250 ?
O6   0.85660   0.29260   0.65940 ?
O7   0.12530   0.11830   0.45870 ?
O8   0.99300   0.43350   0.32920 ?
H1   0.11820   0.40010   0.32480   0.03166
H2   0.94420   0.35330   0.26820   0.03166
H3   0.99150   0.12200   0.44940   0.03166
H4   0.16530   0.02750   0.49840   0.03166
H5   0.81970   0.17610   0.26950   0.03166
H6   0.59010   0.06630   0.34030   0.03166
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Ba 0.01670 0.01658 0.01513 -0.00042 0.00067 0.00000
Si1 0.01268 0.01143 0.01333 0.00000 0.00033 0.00091
Si2 0.01361 0.01429 0.01081 0.00000 0.00100 0.00182
O1 0.02721 0.01943 0.01441 0.00000 0.00267 0.00000
O2 0.02597 0.01829 0.02414 0.00210 -0.00401 0.00272
O3 0.01948 0.02001 0.02054 0.00210 0.00434 0.00272
O4 0.02257 0.01315 0.02198 0.00084 0.00067 0.00363
O5 0.02999 0.02115 0.01910 0.00336 0.00534 0.00227
O6 0.02164 0.02286 0.01153 0.00168 0.00367 0.00499
O7 0.02876 0.03029 0.02342 -0.00378 0.00100 0.00182
O8 0.02628 0.02515 0.02811 0.00084 0.00167 -0.00091

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.84 Å	(100)
6.36 Å	(45)
5.34 Å	(45)
3.01 Å	(40)
6.7 Å	(30)
3.94 Å	(30)
3.66 Å	(30)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-𝑇 alteration and/or metamorphism
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits
Stage 5: Initiation of plate tectonics	<3.5-2.5
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)

Type Occurrence of KrauskopfiteHide

Type Locality:

ⓘ Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA

General Appearance of Type Material:

Grains without crystal faces.

Place of Conservation of Type Material:

California Division of Mines and Geology, San Francisco, California, USA.

Associated Minerals at Type Locality:

Reference:

Alfors J T, Stinson M C, Matthews R A, Pabst A (1965) Seven new barium minerals from eastern Fresno County, California. American Mineralogist 50, 314-340

Synonyms of KrauskopfiteHide

IMA1964-008

Other Language Names for KrauskopfiteHide

German:Krauskopfit

Russian:Краускопфит

Spanish:Krauskopfita

Common AssociatesHide

Associated Minerals Based on Photo Data:

4 photos of Krauskopfite associated with Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
4 photos of Krauskopfite associated with Rosasite	(Cu,Zn)₂(CO₃)(OH)₂
2 photos of Krauskopfite associated with Limonite
2 photos of Krauskopfite associated with Quartz	SiO₂
2 photos of Krauskopfite associated with Goethite	α-Fe³⁺O(OH)
1 photo of Krauskopfite associated with Titantaramellite	Ba₄(Ti,Fe³⁺,Fe²⁺,Mg)₄(B₂Si₈O₂₇)O₂Cl_x

Related Minerals - Strunz-mindat Grouping Hide

9.DH.	Gageite-2M	(Mn,Mg,Zn)₄₂Si₁₆O₅₄(OH)₄₀	Mon. 2/m
9.DH.	Bavsiite	Ba₂V₂O₂[Si₄O₁₂]	Tet. 4/m : I4/m
9.DH.	Devilliersite	Ca₄Ca₂Fe³⁺₁₀O₄[(Fe³⁺₁₀Si₂)O₃₆]	Tric. 1 : P1
9.DH.	Yuzuxiangite	Sr₃Fe³⁺(Si₂O₆)₂(OH) · 3H₂O	Mon. 2/m : P2₁/m
9.DH.	Louisfuchsite	Ca₂(Mg₄Ti₂)(Al₄Si₂)O₂₀	Tric. 1 : P1
9.DH.05	Leucophanite	NaCaBeSi₂O₆F	Orth. 2 2 2 : P2₁ 2₁ 2₁
9.DH.10	Ohmilite	Sr₃(Ti,Fe³⁺)(Si₄O₁₂)(O,OH) · 2-3H₂O	Mon. 2/m : P2₁/m
9.DH.15	Haradaite	SrVSi₂O₇	Orth. mmm (2/m 2/m 2/m)
9.DH.15	Suzukiite	BaVSi₂O₇	Orth.
9.DH.20	Batisite	BaNaNaTi₂(Si₄O₁₂)O₂	Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.20	Shcherbakovite	(K,Ba)KNa(Ti,Nb)₂(Si₄O₁₂)O₂	Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.20	Noonkanbahite	BaKNaTi₂(Si₄O₁₂)O₂	Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.25	Taikanite	Sr₃BaMn²⁺₂(Si₄O₁₂)O₂	Mon. 2 : B2
9.DH.35	Balangeroite	(Mg,Fe²⁺,Fe³⁺,Mn²⁺)₄₂Si₁₆O₅₄(OH)₄₀	Mon. 2/m
9.DH.35	Gageite	Mn₂₁(Si₄O₁₂)₂O₃(OH)₂₀	Mon. 2/m
9.DH.40	Aenigmatite	Na₄[Fe²⁺₁₀Ti₂]O₄[Si₁₂O₃₆]	Tric. 1 : P1
9.DH.40	Dorrite	Ca₄(Mg₃Fe³⁺₉)O₄(Si₃Al₈Fe³⁺O₃₆)	Tric.
9.DH.40	Høgtuvaite	Ca₄[Fe²⁺₆Fe³⁺₆]O₄[Si₈Be₂Al₂O₃₆]	Tric. 1 : P1
9.DH.40	Krinovite	Na₂Mg₄Cr³⁺₂(Si₆O₁₈)O₂	Tric. 1 : P1
9.DH.40	Makarochkinite	(Ca,Na)₄[Fe²⁺₈Fe³⁺₂Ti₂]O₄[Si₈Be₂Al₂O₃₆]	Tric. 1 : P1
9.DH.40	Rhönite	Ca₄[Mg₈Fe³⁺₂Ti₂]O₄[Si₆Al₆O₃₆]	Tric. 1 : P1
9.DH.40	Serendibite	Ca₄[Mg₆Al₆]O₄[Si₆B₃Al₃O₃₆]	Tric. 1 : P1
9.DH.40	Welshite	Ca₄Mg₉Sb₃O₄[Si₆Be₃AlFe₂O₃₆]	Tric. 1 : P1
9.DH.40	Wilkinsonite	Na₂Fe²⁺₄Fe³⁺₂(Si₆O₁₈)O₂	Tric. 1 : P1
9.DH.40	Leucorhönite	Ca₂(Mg,Fe³⁺,Al)₆(Si,Al)₆O₂₀	Tric.
9.DH.40	Kuratite	Ca₂(Fe²⁺₅Ti)O₂[Si₄Al₂O₁₈]	Tric. 1 : P1
9.DH.40	Khesinite	Ca₄(Mg₃Fe³⁺₉)O₄(Fe³⁺₉Si₃)O₃₆	Tric. 1 : P1
9.DH.40	UM1991-29-SiO:FeMgNa	Na₄(Mg₅Fe³⁺₇)O₄[Si₉Fe³⁺₃O₃₆]
9.DH.45	Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]	Mon. 2/m : P2₁/b
9.DH.50	Khmaralite	(Mg,Al,Fe)₁₆[(Al,Si,Be)₁₂O₃₆]O₄	Mon. 2/m : P2₁/b
9.DH.55	Surinamite	(Mg,Fe)₃Al₄BeSi₃O₁₆	Mon. 2/m
9.DH.55	UM1988-26-SiO:AlMg	Mg₄Al₂O[Si₃Al₂O₁₅]
9.DH.60	Deerite	(Fe,Mn)₆(Fe,Al)₃[Si₆O₁₇]O₃(OH)₅	Mon. 2/m : P2₁/b
9.DH.65	Howieite	Na(Fe,Mn)₁₀(Fe,Al)₂Si₁₂O₃₁(OH)₁₃	Tric.
9.DH.65	Taneyamalite	(Na,Ca)(Mn,Mg,Fe)₁₂Si₁₂(O,OH)₄₄	Tric.
9.DH.70	Johninnesite	Na₂Mn²⁺₉Mg₇(OH)₈[AsO₄]₂[Si₆O₁₇]₂	Tric.
9.DH.75	Agrellite	NaCa₂Si₄O₁₀F	Tric. 1 : P1

Other InformationHide

Thermal Behaviour:

Gives off water in a closed tube test and fuses at about 5 to a colorless bead.

Heated in an electric furnace, the mineral is stable at 100 °C, but at 300 °C it decrepitates and turns opaque white. At 450 °C it has a total weight loss of 16.7 per cent. There is no further change up to 1200 °C. At 1300 °C., it partially melts to a colorless glass.

Notes:

Readily decomposed by cold dilute acids leaving a white to transparent silica residue. Not affected by weak bases.

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 KrauskopfiteHide

mindat.org URL:

https://www.mindat.org/min-2271.html
Please feel free to link to this page.

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External Links:

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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 KrauskopfiteHide

Reference List:

Alfors, John T., Stinson, Melvin C., Matthews, Robert A., Pabst, Adolf (1965) Seven new barium minerals from eastern Fresno County, California. American Mineralogist, 50 (3-4) 314-340

Coda, A., dal Negro, A., Rossi, G. (1967) The crystal structure of krauskopfite. Atti della Accademia Nazionale dei Lincei, Serie, 8(42), 859-873.

American Mineralogist (1984): 69: 358.

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

Localities for KrauskopfiteHide

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.


Czech Republic
Moravian-Silesian Region Bruntál District Horní Benešov ⓘ Horní Benešov mines	Fojt B.: Ba-minerály železnorudné ... +1 other reference

Iran
Isfahan Province Isfahan County Esfahan (Isfahan) ⓘ Chah Kuh	Dr. H. J. Wilke and Sohne (Eppertshausen)

Japan
Ehime Prefecture Iyo district Tobe-cho ⓘ Furumiya mine	Hirowatari & Fukuoka (1981)

USA
California Fresno County Big Creek-Rush Creek Mining District Big Creek ⓘ Esquire No. 8 claim	Walstrom (n.d.)
ⓘ Rush Creek	Van Nostrand Reinholt Press: 464. +2 other references
ⓘ Esquire No. 1 claim (TL)	Van Nostrand Reinholt Press: 464 +4 other references
ⓘ Snow Cap Mine	Walstrom (n.d.)
Mariposa County East Belt Clearing House Mining District Clearing House Trumbull Peak ⓘ Trumbull Peak Ba-silicate deposit
Tulare County Dumtah ⓘ Baumann prospect (Bauman Ranch)	Mineralogical Record: 34 (2) +1 other reference
ⓘ Van Gordon Creek Prospect	Walstrom (n.d.)

Krauskopfite

About KrauskopfiteHide

Unique IdentifiersHide

IMA Classification of KrauskopfiteHide

Classification of KrauskopfiteHide

Mineral SymbolsHide

Physical Properties of KrauskopfiteHide

Optical Data of KrauskopfiteHide

Chemistry of KrauskopfiteHide

Crystallography of KrauskopfiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of KrauskopfiteHide

Synonyms of KrauskopfiteHide

Other Language Names for KrauskopfiteHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for KrauskopfiteHide

References for KrauskopfiteHide

Localities for KrauskopfiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide