Mcbirneyite

Formula:  Cu3(VO4)2

Origin of name:  For Alexander McBirney, American vulcanologist

 

Crystal system:  Triclinic

Crystal class:  -1

Twinning: 

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Colour:  Black

Diaphaneity:  Opaque

Luster:  Metallic

Habit:  Anhedral crystals < 200 µm

Hardness

Specific gravity

Cleavage:  None

Tenacity: 

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