Formula: (Cu,Co)2(CO3)(OH)2
Origin of name: After locality; Kilwezi, Shaba, Zaire
Crystal system: Monoclinic
Crystal class: 1 or -1
Twinning:
Unit cell: a = 9.37 Ǻ, b = 12.07 Ǻ, c = 3.39 Ǻ, β = 90.2°
Colour: Black to beige
Diaphaneity:
Luster:
Habit: Microcrystalline crusts, nodules, 1 - 10 mm
Hardness: ~ 4
Specific gravity: 3.97
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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