Mineral phase
IMA name
Ilmenite
Secondary names
Titanoferrite
CAS number
12168-52-4
Type
Class
non-silicate mineral
Compound type
oxide-hydroxide
Chemical composition
Formula
$Fe^{2+}TiO_3$
Chemical formula
(Fe2+)Ti03
Elemental formula
(Fe2+) Ti O3
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Fe^{2+}$ Iron(II) cation element 1 constituent element main
$Ti$ Titanium element 1 constituent element main
$O$ Oxygen element 3 constituent element main
Composition comments
Common impurities: ?
Oxides
Formula $TiO_{2}$ $FeO$
Mass fraction (%) 52.65 47.35

Strunz

Class
oxides - hydroxides - arsenites (04)
Division
metal:oxygen = 2:3, 3:5, and similar (04.C)
Family
with medium-sized cations (04.CB)
Code
04.CB.05

Dana

Major class
oxides and hydroxides (III)
Class
simple oxides (04)
Type
with a cation charge of 3+ (A+++2O3) (04.03)
Group
Ilmenite group (04.03.05)
Code
04.03.05.01
Phase type
crystalline
Crystal system
trigonal
Crystal class
rhombohedral
Crystal class symbol
-3 (S6)
Crystal spacegroup
R-3
Molar mass
151.73 $g/mol$
Density
4.72 $g/cm^3$
State NTP
solid
Refringence type
uniaxial
Refringence sign
negative
Refraction index $n_o$ (w)
2.4
Pure color
black
Color
iron black, black
Diaphaneity
opaque
Luster
submetallic
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