Wikipedia
Achávalite
Achávalite is a selenide mineral that is a member of the nickeline group. It has only been found in a single Argentinian mine system, being first discovered in 1939 in a selenide deposit. The type locality is Cacheuta mine, Sierra de Cacheuta, Mendoza, Argentina.[2][3][4]
| Achávalite | |
|---|---|
Black metallic crystals of achávalite from Cacheuta Mine, Mendoza, Argentina | |
| General | |
| Category | Selenide mineral |
| Formula (repeating unit) | (Fe,Cu)Se |
| IMA symbol | Ahv[1] |
| Strunz classification | 2.CC.05 |
| Crystal system | Hexagonal |
| Crystal class | Dihexagonal dipyramidal (6/mmm) H-M symbol: (6/m 2/m 2/m) |
| Space group | P63/mmc |
| Unit cell | a = 3.636, c = 5.946 [Å], Z = 2 |
| Identification | |
| Formula mass | 134.81 g/mol |
| Color | Dark grey |
| Mohs scale hardness | 2.5 |
| Luster | Metallic |
| Streak | Grey-black |
| Diaphaneity | Opaque |
| Specific gravity | 6.53 |
| References | [2][3] |
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.
- ^ a b Mindat Profile
- ^ a b Achavalite data on WebMineral
- ^ Hålenius, U., Hatert, F., Pasero, M., and Mills, S.J., IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Newsletter 28. Mineralogical Magazine 79(7), 1859–1864
Wikimedia Commons has media related to Achávalite.
Look up achávalite in Wiktionary, the free dictionary.