Formula: Bi4(S,Se)3
Origin of name: Locality; Ikuno mine, Hyogo Pref., Japan
Crystal system: Hexagonal
Crystal class: -3 2/m
Twinning:
Unit cell:
Colour: Lead-gray
Diaphaneity: Opaque
Luster: Metallic
Habit: Massive; minute grains
Hardness: 2
Specific gravity: 7.8
Cleavage: 1; {0001} perfect
Tenacity:
Streak: Dark grey
Synonyms/varieties:
Comments:
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