Formula: Ni9Sb2S8
Origin of name: for K. Tucek, Czech mineralogist
Crystal system: tetragonal
Crystal class: 4/m 2/m 2/m
Twinning:
Unit cell:
Colour: pale yellow
Diaphaneity: opaque
Luster: metallic
Habit: grains, mostly seen in polished sections
Hardness: 5 to 6
Specific gravity: 6.15
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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