Talnakhite

Formula: Cu9(Fe,Ni)8S16

Origin of name: after locality Talnakh deposit, Norilsk Siberia, Russia

 

Crystal system: cubic

Crystal class: -43m

Twinning:

Unit cell: 

 

Colour: brass-yellow, rapidly tarnishes pink and brown, then iridescent

Diaphaneity: opaque

Luster: metallic

Habit: massive

Hardness

Specific gravity: 4.24

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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