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Anilite

Year of discovery: 1969 (Japan as the first occurence in the World)

Locality list: 3 localities of anilite

• Cu₇S₄
• [Cu²⁺₇][S₄]

• Class: Chalcocite group
• Class: Sulfide
• Phase transition: Transit to Digenite by powdering.

• Color: Bluish gray
• Streak: Black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Prismatic, Platy
• Twin: All reported crystals are twined.

• Cleavage: No
• Hardness: 3
• Density: 5.7

• System: Orthorhombic
• Group: mmm, Pnma
• Lattice: a=7.9, b=7.8, c=11.0,

Etymology: Ani mine in Akita prefecture, Japan