Formula: CuBi2O4
Origin of name: For Isao Kusachi, Japanese mineralogist
Crystal system: Tetragonal
Crystal class: 4/m 2/m 2/m
Twinning:
Unit cell:
Colour: Black
Diaphaneity: Opaque
Luster: Metallic
Habit: Prismatic crystals and platy grains in globular aggregates to 2 mm
Hardness: 4.5
Specific gravity: 8.5
Cleavage: 1; {110} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: Readily soluble in HCl
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