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Sakuraiite

Year of discovery: 1965 (Japan as the first occurence in the World)

Locality list: 3 localities of sakuraiite

• Cu₃InS₄
• (Cu,Zn,Fe,In,Sn)₄S₄
• [Cu²⁺₃][In³⁺][S₄]

• Class: Stannite group
• Class: Sulfide

• In => As: Enargite, Luzonite
• In => Sb: Famatinite
• In => Sn: Petrukite, Kuramite

• Color: Greenish gray
• Streak: Light gray
• Luster: Metallic
• Diaphnaeity: Opaque

• Habit: Massive
• Aggregate: Exsolution with stannite

• Cleavage: No
• Hardness: 4
• Density: 4.5

• System: Cutic
• Group: (-4)3m, P(-4)3m
• Lattice: a=5.5

Etymology: Dr. Kin-nichi Sakurai (1912-1993), Japanese amateur collector of minerals. He is also the etymology of Kinichilite.