Manganese Oxide Mn2O3 Hausmannite type
Mn2O3
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Chemical name
Manganese Oxide Mn2O3 Hausmannite type |
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Mineral name
Hausmannite |
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Chemical formula
Mn2O3 |
|
Melting point [°C]
940 |
|
Crystal system
tetragonal |
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Crystal Class
ditetragonal-dipyramidal (4/m 2/m 2/m) |
|
Space Group
I4_1/amd |
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Unit cell
a [Å]:5.76 b [Å]:5.76 c [Å]:9.44 |
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Molecular weight [g/mol]
157.87 |
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Formula units
Z=4 |
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Twinning
common on (112) |
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Mohs hardness
5.5 |
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Density [g/cm3]
4.7 - 4.84 |
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Cleavage
perfect on {001}, indistinct on {112}, {011} |
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Fracture / Tenacity
brittle, uneven |
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Color
brownish black, grayish |
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Streak
dark reddish brown |
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Transparency
opaque, transparent on thin edges |
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Luster
submetallic |
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Optical character
uniaxial (-) |
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Refractive Index
nω=2.15; nε=2.46 |
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Birefringence δ
0.310 |
