| Osarizawaite | |
| Category: | Sulfate minerals, alunite group |
| Formula: | PbCuAl2(SO4)2(OH)6 |
| Imasymbol: | Orz[1] |
| Strunz: | 7.BC.10 |
| System: | Trigonal |
| Class: | Hexagonal scalenohedral (m) H-M symbol: (2/m) |
| Symmetry: | Rm |
| Unit Cell: | a = 7.05, c = 17.24(1) [Å], Z = 3 |
| Color: | Greenish yellow |
| Tenacity: | Brittle |
| Mohs: | 3 - 4 |
| Gravity: | 3.89 - 4.037 |
| Opticalprop: | Uniaxial (+) |
| Refractive: | nω = 1.712 nε = 1.732(2) |
| Birefringence: | δ = 0.020 |
| Pleochroism: | Visible |
| References: | [2] [3] [4] |
Osarizawaite is a greenish yellow sulfate mineral with the chemical formula: PbCuAl2(SO4)2(OH)6. It has rhombohedral crystals.[5]
It was first described in 1961 for an occurrence in the oxidized zone of the Osarizawa mine, Akita Prefecture, Honshu Island, Japan.[2]