Kusachiite

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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