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Watanabeite

Year of discovery: 1993 (Japan as the first occurence in the World)

Locality list: A locality of watanabeite

• Cu₄As₂S₅
• Cu₄(As,Sb)₂S₅
• [Cu⁺₄][As³⁺₂][S₅]^10-

• Class: Cu sulfosalts < Sulfosalt class
• Class: Sulfosalt

• Color: Gray, Dark gray
• Streak: Gray
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Fine grain

• Cleavage: No
• Hardness: 4-4.5
• Density: 4.7

• System: Orthorhombic
• Lattice: a=14.5, b=13.3, c=18.0

Etymology: Professor Takeo Watanabe (1907-1986), economic geologist of the University of Tokyo.