Manganese Iron Oxide
(Mn,Fe)2O3
Chemical name
Manganese Iron Oxide
Mineral name
Bixbyite
Chemical formula
(Mn,Fe)2O3
Crystal system
cubic
Crystal Class
cubic-diploidal (2/m -3)
Space Group
Ia3
Unit cell
a [Å]:9.41
b [Å]:9.41
c [Å]:9.41
Molecular weight [g/mol]
158,31
Formula units
Z=16
Twinning
penetration twinning on {111}
Mohs hardness
6 - 6.5
Density [g/cm3]
4.95
Cleavage
imperfect on {111}
Fracture / Tenacity
uneven to conchoidal
Color
black
Streak
black
Transparency
opaque
Optical character
isotropic