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