Tellurobismuthite

Formula: Bi2Te3

Origin of name: from composition containing tellurium and bismuth

 

Crystal system: Hexagonal

Crystal class: 3 2/m

Twinning:

Unit cell: a = 4.3852, c = 30.483

 

Colour: Pale lead-gray

Diaphaneity: Opaque

Luster: Metallic, splendent on fresh cleavages

Habit: Irregular plates, foliated masses, massive, fibrous

Hardness: 1.5 to 2

Specific gravity: 7.82

Cleavage: 1; {0001} perfect

Tenacity: Flexible but not elastic, slightly sectile

Streak: Pale lead-gray

 

Synonyms/varieties:

 

Comments: series with tellurantimony

 

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