Formula: RhAS
Origin of name: For V.A. Cherepanov (19270-1983), Russian mineralogist
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell: a = 5.70 Å, b = 3.59 Å, c = 6.00 Å
Colour: Black
Diaphaneity: Opaque
Luster: Metallic
Habit: Grains up to 20 µm, aggregates up to 100 µm
Hardness: 6
Specific gravity: 9.72
Cleavage: 1
Tenacity:
Streak: Black
Synonyms/varieties:
Comments: Found in a placer with other platinum group element minerals derived from an ultramafic massif in an ophiolite belt
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