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Idaite

Year of discovery: 1958 (Ida mine, Namibia), 1961 (Japan)

Locality list: 20 localities of idaite

• Cu₅FeS₆
• [Cu²⁺₅][Fe²⁺][S₆]^12-

• Class: Sulfide

• Color: Reddish brown
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Massive
• Aggregate: At rim or fracture of chalcopyrite

• Hardness: 2.5-3.5
• Density: 4.2

• System: Hexagonal
• Group: 6/mmm, P6₃/mmc
• Lattice: a=3.9, c=17.0

Etymology: Ida mine in Namibia