Mgriite

Formula:  Cu3AsSe3

Origin of name:  From initials of Moscow Geological Razved (Exploration) institute

 

Crystal system:  Cubic

Crystal class:  4/m -3 2/m

Twinning: 

Unit cell: 

 

Colour:  Light gray, brownish tint in reflected light

Diaphaneity: 

Luster:  Metallic

Habit:  Massive

Hardness

Specific gravity:  4.9

Cleavage:  None

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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