Mattagamite

Formula:  CoTe2

Origin of name:  After locality; Matagami Lake mine, Quebec, Canada

 

Crystal system:  Orthorhombic

Crystal class:  mm2

Twinning: 

Unit cell: 

 

Colour:  Violet (polished section)

Diaphaneity:  Opaque

Luster: 

Habit:  Massive; equidimensional grains or blade-like grains, minute; or rims on pyrrhotite and chalcopyrite

Hardness:  4.5 to 5.5

Specific gravity:  8.0

Cleavage:  None

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments:  Series with frohbergite

 

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