Formula: CoSbS
Origin of name: From cobalt and antimony (Latin Stibium)
Crystal system: Orthorhombic
Crystal class: mm2
Twinning:
Unit cell: a = 3.603 Å, b = 4.868 Å, c = 5.838 Å
Colour: Grayish in polished section
Diaphaneity: Opaque
Luster: Metallic
Habit: Massive, small lammellae
Hardness: 6
Specific gravity: 6.89
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Dimorphous with paracostibite. Found intimately intergrown with other hydrothermal sulphides; in Pb-Zn-Cu ore deposits remobilised by hydrothermal fluids later granite emplacement
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