Briartite
Briartite is an opaque iron-grey metallic sulfide mineral, Cu2(Zn,Fe)GeS4 with traces of Ga and Sn, found as inclusions in other germanium-gallium-bearing sulfides.[1]
| Briartite | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | Cu2(Fe,Zn)GeS4 |
| Strunz classification | 02.KA.10(02) |
| Dana classification | 2.9.2.3.(02) |
| Crystal system | Tetragonal |
| Space group | 07;10 |
| Unit cell | 297.46 ų |
| Identification | |
| Colour | Gray to gray blue; Iron-grey |
| Twinning | Polysynthetic |
| Mohs scale hardness | 3½ - 4½ |
| Luster | Metallic; Unpolished |
| Diaphaneity | Opaque |
| Specific gravity | 4.337 (Calculated) |
| Density | 4.337 g/cm3 (Calculated) |
| Common impurities | Ga, Sn |
It was discovered at the Prince Léopold Mine, Kipushi, Shaba, Congo (Léopoldville) in 1965 by Francotte and others, and named for Gaston Briart who had studied formations at Kipushi.[2]
References
- "Briartite". www.mindat.org. Retrieved 2021-02-09.
- "New Mineral Names" (PDF). Mineral Society of America. Retrieved 9 February 2021.
- "Briartite" (PDF). Handbook of Mineralogy. Retrieved 9 February 2021.
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