Joseite

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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