Formula: Bi4(Se,S)3
Origin of name: For A. Laitakari, Finnish geologist
Crystal system: Hexagonal
Crystal class: -3 2/m
Twinning:
Unit cell:
Colour: Galena-white
Diaphaneity: Opaque
Luster: Metallic
Habit: Foliated plates and sheets; tiny grains
Hardness:
Specific gravity: 8.12
Cleavage: 1; Basal, excellent
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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