Kësterite

Formula:  Cu2(Zn,Fe)SnS4

Origin of name:  Locality; Kester deposit, Yano-Adychansk, Russia

 

Crystal system:  Tetragonal

Crystal class:  -42m

Twinning: 

Unit cell: 

 

Colour:  Greenish black

Diaphaneity:  Opaque

Luster:  Metallic

Habit:  Massive

Hardness:  4.5

Specific gravity:  4.54 to 4.59

Cleavage:  None

Tenacity: 

Streak:  Black

 

Synonyms/varieties:

 

Comments: 

 

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