Abswurmbachite
Copper manganese silicate mineral
From Wikipedia, the free encyclopedia
Abswurmbachite is a copper manganese silicate mineral ((Cu,Mn2+)Mn3+6O8SiO4). It was first described in 1991 and named after Irmgard Abs-Wurmbach (born 1938), a German mineralogist. It crystallizes in the tetragonal system. Its Mohs scale rating is 6.5 and a specific gravity of 4.96. It has a metallic luster and its color is jet black, with light brown streaks.
| Abswurmbachite | |
|---|---|
| |
| General | |
| Category | Nesosilicate |
| Formula | (Cu,Mn2+)Mn3+6O8SiO4 |
| IMA symbol | Abs[1] |
| Strunz classification | 9.AG.05 |
| Dana classification | 7.5.1.4 |
| Crystal system | Tetragonal |
| Crystal class | 4/mmm – Ditetragonal dipyramidal |
| Unit cell | 1640.82 Å3 |
| Identification | |
| Color | Black |
| Cleavage | None observed |
| Tenacity | Brittle |
| Mohs scale hardness | 6.5 |
| Luster | Metallic |
| Streak | Brownish black |
| Specific gravity | 4.96 g/cm3 |
| Density | 4.96 g/cm3 |
| Pleochroism | Non-pleochroic |
| Common impurities | Iron |
| References | [2] |
