Achávalite
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Achávalite | |
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![]() 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] |
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]
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
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