Constituent
Name
Rutile
IMA name
Rutile
Class
non-silicate mineral
Compound type
oxide-hydroxide
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0
Chemical composition
Formula
Ti$_{0.984}$V$_{0.008}$Fe$_{0.008}$O$_{2}$
Chemical formula
Ti0.984 V0.008 Fe0.008 O2
Elemental formula
(Ti)0-1 (O)0-2
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Ti$ Titanium element 0 - 1 1.0 constituent element main
$V^{5+}$ Vanadium(V) cation element 0 - 1 1.0 constituent element impurity
$Fe^{2+}$ Iron(II) cation element 0 - 1 1.0 constituent element impurity
$O$ Oxygen element 0 - 2 1.0 constituent element main
Composition comments
The natural rutile sample has a small (>1 %) OH content that is not shown in the formula of the chemical composition.
Oxides
Formula $TiO_{2}$ $V_{2}O_{5}$ $FeO$
Mass fraction (%) 97.16 1.43 1.41

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 $g/cm^3$
Refringence type
uniaxial
Refringence sign
positive
Birefringence
0.287 - 0.294
Refraction index $n_{\alpha}$
2.605 - 2.621
Refraction index $n_{\beta}$
2.899 - 2.908
Color
reddish brown
Diaphaneity
transparent to opaque
Luster
adamantine