Iron Titanate
FeTiO3
Chemical name
Iron Titanate
Mineral name
Ilmenite
Chemical formula
FeTiO3
Crystal system
trigonal
Crystal Class
trigonal-rhombohedral (-3)
Space Group
R-3
Unit cell
a [Å]:5.09
b [Å]:5.09
c [Å]:14.09
Formula units
Z=6
Twinning
simple on {0001} lamellar on {10-11}
Mohs hardness
5 - 6
Density [g/cm3]
4.5 - 5
Cleavage
absent
Fracture / Tenacity
conchoidal to subconchoidal
Color
iron-black, gray, brownish tint in reflected light
Streak
black
Transparency
opaque
Optical character
uniaxial (-)
Pleochroism δ
moderate to strong