Skinnerite

Formula: Cu3SbS3

Origin of name: for B. Skinner, American geochemist

 

Crystal system: monoclinic

Crystal class: 2/m

Twinning: polysynthetic

Unit cell: 

 

Colour: gray

Diaphaneity: opaque

Luster: metallic

Habit: irregular grains, 0.1 mm, polysynthetic twinning

Hardness: 3 to 3.5

Specific gravity: 5.07

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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