Algodonite
| Algodonite | |
|---|---|
|
Algodonite - Houghton County, Michigan, USA | |
| General | |
| Category | Sulfide mineral |
| Formula (repeating unit) | Cu6As |
| Strunz classification | 02.AA.10a |
| Crystal symmetry | Hexagonal - dihexagonal dipyramidal, H-M symbol (6/m 2/m 2/m), space group P63/mmc |
| Unit cell | a = 2.6 Å, c = 4.228 Å, Z = 2 |
| Identification | |
| Formula mass | 456.2 g |
| Color | Gray, silver white, steel gray, tarnishes dull bronze |
| Crystal habit | Massive, granular. Common texture observed in granite and other igneous rock |
| Fracture | Sub-conchoidal |
| Mohs scale hardness | 4 |
| Luster | Metallic |
| Diaphaneity | Opaque |
| Specific gravity | 8.38 (measured), 8.72 (calculated) |
| Other characteristics | Non-magnetic, non-fluorescent |
| References | [1][2][3] |
Mohawkite nugget, a mixture of domeykite, algodonite and copper
Algodonite is a copper arsenide mineral with formula: Cu6As. It is a gray white metallic mineral crystallizing in the hexagonal system. It has a Mohs hardness of 4 and a specific gravity of 8.38 - 8.72.
It was first described in 1857 from the Algodones silver mine, Coquimbo, Chile.
References
- ↑ Algodonite. Webmineral
- ↑ Algodonite. Mindat.org
- ↑ Williams, Sidney A. (1963). "Crystals of rammelsbergite and algodonite". American Mineralogist 48: 421–422.
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