Briartite
| Briartite | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | Cu2(Fe,Zn)GeS4 |
| IMA symbol | Btt[1] |
| 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 | 3.5–4.5 |
| Luster | Metallic; Unpolished |
| Diaphaneity | Opaque |
| Specific gravity | 4.337 (Calculated) |
| Density | 4.337 g/cm3 (Calculated) |
| Common impurities | Ga, Sn |
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.[2]
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.[3]
Briartite is also found in Namibia, Greece, and Spain.[4]
See also
[edit]References
[edit]- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ "Briartite". www.mindat.org. Retrieved 2021-02-09.
- ^ "New Mineral Names" (PDF). Mineral Society of America. Archived (PDF) from the original on 2012-07-23. Retrieved 9 February 2021.
- ^ "Briartite" (PDF). Handbook of Mineralogy. Archived (PDF) from the original on 2011-07-09. Retrieved 9 February 2021.
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