Hausmannite

Formula:  MnMn2O4

Origin of name:   For J. Hausmann, German mineralogist

 

Crystal system:  Tetragonal

Crystal class:  4/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour:  Brownish black

Diaphaneity:  Opaque

Luster:  Submetallic

Habit:  Crystals pseudo-octahedral; massive, granular

Hardness:  5.5

Specific gravity:  4.84

Cleavage:  3; {001} nearly perfect; {112} and {001} indistinct

Tenacity: 

Streak:  Brown

 

Synonyms/varieties:

 

Comments: 

 

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