General Information
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 Chemical Formula: |
KFe+++(SO4)2·(H2O) |
| Composition: |
Molecular Weight = 305.09 gm) |
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| Empirical Formula: |
KFe3+(SO4)2·(H2O) |
| Environment: |
Hydrothermally altered rocks. |
| Locality: |
Sulfur Hole, near Borate Camp, Mule Canyon, Calico Mountains, San Bernardino Co., California. |
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Classification
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| Dana Class: |
29.5.1.1 (29)Hydrated Acid and Sulfates |
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(29.5)where A B (XO4)2 · x(H2O) |
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(29.5.1)Dana Group |
| Strunz Class: |
VI/C.15-10 VI - Sulfates,Chromates,Molybdates and Tungstates |
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VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium and very big size |
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VI/C.15 - Krausite - Amarillite series |
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Crystallography
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| Axial Ratios: |
a:b:c =1.539:1:1.7516 |
| Cell Dimensions: |
a = 7.92, b = 5.146, c = 9.014, Z = 2; beta = 102.76ø V = 358.30 Den(Calc)= 2.83 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P21/m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.09(1) 4.4(0.74) 6.59(0.66) |
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Physical Properties
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| Cleavage: |
[???] Perfect, [???] Distinct |
| Color: |
yellow green, light yellow, or lemon. |
| Density: |
2.84 |
| Diaphaniety: |
Transparent |
| Hardness: |
2.5 - Finger Nail |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties
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| Optical Data: |
Biaxial (+), a=1.588, b=1.65, g=1.722, bire=0.1340 |
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Other Information
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| References: |
NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Krausite :
1 -American Mineralogist Crystal Structure Database
2 -Athena Mineralogy
3 - EUROmin Project
4 -MinDat.org Location Data
5 -MinMax
6 -WWW-MINCRYST
7 -École des Mines de Paris
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Pronunciation Guide 
