Mineral phase
IMA name
Rutile
Type
Class
non-silicate mineral
Compound type
oxide-hydroxide
Chemical composition
Formula
$TiO_2$
Chemical formula
TiO2
Elemental formula
Ti O2
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Ti$ Titanium element 1 constituent element main
$O$ Oxygen element 2 constituent element main
Composition comments
Common impurities: Fe, Ta, Nb, Cr, V, Sn
Oxides
Formula $TiO_{2}$
Mass fraction (%) 100.0

Strunz

Class
oxides - hydroxides - arsenites (04)
Division
metal:oxygen = 1:2 and similar (04.D)
Family
with medium-sized cations; chains of edge-sharing octahedra (04.DB)
Code
04.DB.05

Dana

Major class
oxides and hydroxides (III)
Class
simple oxides (04)
Type
with a cation charge of 4+ (A++++O2) (04.04)
Group
Rutile group (Tetragonal: P4/mnm) (04.04.01)
Code
04.04.01.01
Phase type
crystalline
Crystal system
tetragonal
Crystal class
ditetragonal-dipyramidal
Crystal class symbol
4/mmm (D4h)
Crystal spacegroup
P4(2)/mnm
Molar mass
79.88 $g/mol$
Density
4.25 $g/cm^3$
State NTP
solid
Refringence type
uniaxial
Refringence sign
positive
Birefringence
0.287 - 0.294
Refraction index $n_o$ (w)
2.605 - 2.621
Refraction index $n_e$ (e)
2.899 - 2.908
Pure color
yellow
Color
bluish, yellow, brownish yellow, blood red, brown red, violet, brown, black
Diaphaneity
transparent to opaque
Luster
adamantine
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