Achávalite
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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 loc
Black metallic crystals of achávalite from Cacheuta Mine, Mendoza, Argentina
Nickeline
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Nickeline or niccolite is the mineral form of nickel arsenide. The naturally occurring mineral contains roughly 43.9% nickel and 56.1% arsenic by mass, but composition of the mineral may vary slightly
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…
Nickeline