Marokite

Formula:  CaMn2O4

Origin of name:  After locality; Morocco

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour:  Black, dark red internal reflections

Diaphaneity:  Opaque

Luster:  Bright

Habit:  Crystals flattened, large, to 5 cm

Hardness

Specific gravity:  4.64

Cleavage:  2; {100} perfect, {001} good

Tenacity: 

Streak:  Reddish brown

 

Synonyms/varieties:

 

Comments: 

 

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