Cobaltite
| Cobaltite | |
|---|---|
Cobaltite from Sweden | |
| General | |
| Category | Sulfide mineral |
| Formula | CoAsS |
| IMA symbol | Cbt |
| Strunz classification | 2.EB.25 |
| Crystal system | Orthorhombic |
| Crystal class | Pyramidal (mm2) (same H-M symbol) |
| Space group | Pc21b |
| Unit cell | a = 5.582 Å, b = 5.582 Å, c = 5.582 Å; Z = 4 |
| Identification | |
| Color | Reddish silver white, violet steel gray to black |
| Crystal habit | Granular to massive, rarely as striated crystals, pseudocubic. |
| Twinning | About [111] creating pseudo-cubic forms and striations |
| Cleavage | Perfect on {001} |
| Fracture | Uneven |
| Tenacity | Brittle |
| Mohs scale hardness | 5.5 |
| Luster | Metallic |
| Streak | Grayish-black |
| Diaphaneity | Opaque |
| Density | 6.33 g/cm3 |
| References | |
Cobaltite is an arsenide and sulfide mineral with the mineral formula CoAsS. It is the naming mineral of the cobaltite group of minerals, whose members structurally resemble pyrite (FeS2).