Formula: CuGaS2
Origin of name: For the mineral's gallium content.
Crystal system: Tetragonal
Crystal class: 4 2m
Twinning:
Unit cell: a = 5.35, c = 10.48
Colour: Gray
Diaphaneity: Opaque
Luster: Metallic
Habit: Massive; minute embedded grains; exsolution lamellae
Hardness: 3 to 3.5
Specific gravity: 4.40
Cleavage: None
Tenacity:
Streak: Gray-black
Synonyms/varieties:
Comments:
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