Formula: Cu11(VO4)6O2
Origin of name: For Larry W. Finger, American geophysicist
Crystal system: Triclinic
Crystal class: -1
Twinning:
Unit cell:
Colour: Black
Diaphaneity: Opaque
Luster: Metallic
Habit: Plate-like and equant crystals, anhedral to subhedral, submicroscopic to 150µm
Hardness:
Specific gravity: 4.78
Cleavage: None
Tenacity:
Streak: Dark reddish brown
Synonyms/varieties:
Comments:
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