Osarizawaite
Osarizawaite | |
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Osarizawaite from Arizona | |
General | |
Category | Sulfate minerals, alunite group |
Formula (repeating unit) | PbCuAl2(SO4)2(OH)6 |
Strunz classification | 7.BC.10 |
Crystal system | Trigonal |
Crystal class |
Hexagonal scalenohedral (3m) H-M symbol: (3 2/m) |
Space group | R3m |
Unit cell | a = 7.05, c = 17.24(1) [Å], Z = 3 |
Identification | |
Color | Greenish yellow |
Tenacity | Brittle |
Mohs scale hardness | 3 - 4 |
Specific gravity | 3.89 - 4.037 |
Optical properties | Uniaxial (+) |
Refractive index | nω = 1.712() nε = 1.732(2) |
Birefringence | δ = 0.020 |
Pleochroism | Visible |
References | [1][2][3] |
Osarizawaite is a greenish yellow sulfate mineral with the chemical formula: PbCuAl2(SO4)2(OH)6. It has rhombohedral crystals.[4]
It was first described in 1961 for an occurrence in the oxidized zone of the Osarizawa mine, Akita Prefecture, Honshu Island, Japan.[1]
References
- 1 2 Mindat.org
- ↑ Webmineral.com
- ↑ Handbook of Mineralogy
- ↑ Fleischer, Michael & Mandarino, Joseph, "Glossary of Mineral Species", The Mineralogical Record, 1991
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