Mineral description : Hausmannite

Mineral class	Oxides : Pyrolusite manganite group
Chemical formula	Mn3O4
Crystal system	Tetragonal.
Habitus	Octaedric dipyramidal crystals. Also as single grains, grainy aggregates and massive.
Cleavage	[001] Perfect.
Hardness	5 - 5.5
Density	4.7 - 4.8
Color	Black, opaque.
Streak	Reddish brown.
Luster	Submetallic.
Description	A manganese ore.
Occurance
Associates
Notes	Type locality : Ilfeld, Harz, Germany. Named after the German mineralogist, J. F. L. Hausmann (1782-1859). Hausmannite isn't magnetic, separates it from magnetite.
Localities	A common manganese ore in Sweden Långban, Värmland. As grainy impregnations in dolomite. Nordmark, Värmland. As grainy impregnations in dolomite. Harstigen, Värmland. As grainy impregnations in dolomite. Pajsberg, Värmland. As grainy impregnations in dolomite.

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