Famatinite

Formula:   Cu3SbS4

Origin of name:  For locality; Sierra de Famatina, Argentine

 

Crystal system:   Tetragonal

Crystal class:   -42m

Twinning:

Unit cell: 

 

Colour:  Deep pinkish brown with grayish tinge

Diaphaneity:  Opaque

Luster:   Dull metallic

Habit:   Crystals distinct equant usually with faces curved and etched; massive, fine-grained or coarse-grained

Hardness:   3.5

Specific gravity:   4.64

Cleavage:   2; {101} good, {100} distinct

Tenacity: 

Streak:   Black

 

Synonyms/varieties:

 

Comments:

 

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