Formula: Pb3Zn3TeO6(PO4)2
Origin of name: For A. I. Kuks, Russian discoverer of the Kuranakh gold deposit
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Gray
Diaphaneity: Transparent, turbid
Luster: Adamantine
Habit: Thin tabular crystals 0.1-0.3 mm
Hardness: 5
Specific gravity:
Cleavage: 1; Perfect
Tenacity:
Streak: White
Synonyms/varieties:
Comments: Fluoresces weakly
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