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Famatinite

Year of discovery: 1873 (Sierra de Famatina, Argentina), 1951 (Japan)

Locality list: 7 localities of famatinite

• Cu₃SbS₄
• [Cu²⁺₃][Sb³⁺][S₄]

• Class: Luzonite group
• Class: Sulfide

• Sb => As: Luzonite (Series), Enargite
• Sb => Sn: Petrukite, Kuramite
• Sb => In: Sakuraiite

• S => Se: Permingeatite

• Color: Dark pinkish brown
• Streak: Black
• Luster: Metallic
• Diaphaneity: Opaque

• Aggregate: Massive

• Cleavage: Perfect on {101} (2 planes), Distinct on {110} (2 planes)
• Hardness: 3-4
• Density: 4.6

• System: Tetragonal
• Group: (-4)2m, I(-4)2m
• Lattice: a=5.4, c=10.8

Etymology: Sierra de Famatina, Argentina