Achávalite

Achávalite
Achávalite
	Black metallic crystals of achávalite from Cacheuta Mine, Mendoza, Argentina
General
Category	Selenide mineral
Formula; (repeating unit)	(Fe,Cu)Se
IMA symbol	Ahv
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 , 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

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]

References

^ 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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[1] 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.

[Mindat-2] Mindat Profile

[Webmin-3] Achavalite data on WebMineral

[4] 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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See also

References