Class

non-silicate mineral

Compound type

oxide-hydroxide

Composition comments

Common impurities: Fe, Sn, V, Nb, (Al, Ca)

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; frameworks of edge-sharing octahedra (04.DD)

Code

04.DD.05

Dana

Major class

oxides and hydroxides (III)

Class

simple oxides (04)

Type

with a cation charge of 4+ (A++++O2) (04.04)

Group

-Anatase- group (04.04.04)

Code

04.04.04.01

Phase type

crystalline

Crystal system

tetragonal

Crystal class

ditetragonal-dipyramidal

Crystal class symbol

4/mmm (D4h)

Crystal spacegroup

I4(1)/amd

Texture

monocrystalline

Molar mass

79.88 $g/mol$

Density

3.9 $g/cm^3$

Refringence type

uniaxial

Refringence sign

negative

Birefringence

0.073

Refraction index $n_{\alpha}$

2.561

Refraction index $n_{\beta}$

2.488

Color

nearly colorless (rare), pale yellow, pale green, pale lilac, yellowish brown, dark blue, reddish brown, brown, gray, black

Diaphaneity

transparent to translucent

Luster

adamantine