Formula: Bi4TeS2
Origin of name: Locality; Sao Jose, Brazil
Crystal system: Hexagonal
Crystal class: -3 2/m
Twinning:
Unit cell:
Colour: Steel-gray to greyish black, tarnishes darker or iridescent
Diaphaneity: Opaque
Luster: Metallic
Habit: Irregular laminated masses
Hardness: 2
Specific gravity: 8.10
Cleavage: 1; perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: Dimorphous with protojoseite
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