Hocartite

Formula:  Ag2FeSnS4

Origin of name:  For R. Hocart, French crystallographer

 

Crystal system:  Tetragonal

Crystal class:  -42m

Twinning: 

Unit cell: 

 

Colour:  Brownish-gray (polished section)

Diaphaneity:  Opaque

Luster: 

Habit:  Microscopic grains

Hardness:  ~ 4

Specific gravity:  4.77

Cleavage:  None

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments:  Series with pirquitasite

 

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