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Talnakhite

Year of discovery: 1967 (Talnakh deposit, Russia, and Severniy mine, Russia), 1982 (Japan)

Locality list: 2 localities of talnakhite

• Cu₉Fe₈S₁₆
• Cu₉(Fe,Ni)₈S₁₆
• [Cu²⁺₉][Fe²⁺₈][S₁₆]

• Class: Talnakhite group
• Class: Sulfide

• Color: Yellowish brown
• Tarnish: Pink, Brown
• Streak: Black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Lath

• Hardness: 4-4.5
• Density: 4.3

• System: Cubic
• Group: (-4)3m, I(-4)3m
• Lattice: a=10.6

Etymology: Talnakh deposit in Russia, where this mineral was discovered for the first time.