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Kusachiite

Year of discovery: 1995 (Japan as the first occurence in the World)

Locality list: A locality of kusachiite

• CuBi₂O₄
• [Cu²⁺][Bi³⁺₂][O₄]^8-

• Class: Oxide

• Bi => Fe: Cuprospinel

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

• Habit: Short prismatic
• Aggregate: Globular

• Cleavage: Perfect on {110} (2 planes)
• Hardness: 4.5
• Density: 8.5

• System: Tetragonal
• Group: 4/mmm, P4/ncc
• Lattice: a=8.5, c=5.8

Etymology: Professor Isao Kusachi (1942-), Japanese mineralogist of Okayama University