Osarizawaite
| Osarizawaite | |
|---|---|
|
Osarizawaite from Arizona | |
| General | |
| Category | Sulfate minerals, alunite group |
| Formula (repeating unit) | PbCuAl2(SO4)2(OH)6 |
| Strunz classification | 07.BC.10 |
| Crystal symmetry | 3m (3 2/m) - Hexagonal Scalenohedral |
| Unit cell | a = 7.05Å, c = 17.24(1)Å |
| Identification | |
| Color | Greenish yellow |
| Crystal system | Trigonal |
| 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
- ↑ 1.0 1.1 Mindat.org
- ↑ Webmineral.com
- ↑ Handbook of Mineralogy
- ↑ Fleischer, Michael & Mandarino, Joseph, "Glossary of Mineral Species", The Mineralogical Record, 1991
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