Domeykite
(repeating unit)Cu3As IMA symbol Do[1] Strunz classification 2.AA.10b Crystal system Isometric Crystal class Hextetrahedral (43m)
H-M symbol: (4 3m) Space group I43d Unit cell a = 9.62 Å; Z = 16 Identification Formula mass 265.56 g/mol Color Tin-white to steel-gray Crystal habit Reniform, botryoidal; massive Cleavage None Tenacity Brittle – sectile Mohs scale hardness 3-3.5 Luster Metallic Streak Black gray Diaphaneity Opaque Specific gravity 7.2 – 8.1, average = 7.65 Other characteristics Tarnishes pale yellow, then pale brown, and finally to iridescence References [2][3][4]
H-M symbol: (4 3m)
Domeykite is a copper arsenide mineral, Cu3As. It crystallizes in the isometric system, although crystals are very rare. It typically forms as irregular masses or botryoidal forms. It is an opaque, white to gray (weathers brassy) metallic mineral with a Mohs hardness of 3 to 3.5 and a specific gravity of 7.2 to 8.1.[2][4]
It was first described in 1845 in the Algodones mines, Coquimbo, Chile. It was named after Polish mineralogist Ignacy Domeyko (1802–1889) by Wilhelm Haidinger.[3]
Uses
Domeykite, being a minor copper ore, is used for obtaining copper. It can also be polished and used for ornamental purposes.[5]
See also
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 "Handbook of Mineralogy – Domeykite" (PDF). Archived from the original (PDF) on 2016-03-03. Retrieved 2011-10-21.
- ^ a b Mindat.org – Domeykite
- ^ a b Webmineral data – Domeykite
- ^ galleries – Domeykite
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