Formula: Fe4Fe8Sb12O32S2
Origin of name: from locality Buca della Vena mine, Versilia valley, Apuan Alps, Italy
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell: a = 8.499, b = 8.326, c = 11.935
Colour: Black
Diaphaneity: Opaque
Luster: Metallic
Habit: Crystals platy, commonly massive aggregates
Hardness: 5
Specific gravity: 5.12
Cleavage: 1; {110} perfect
Tenacity:
Streak: Black
Synonyms/varieties:
Comments:
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