Secondary names

Dauphinite, Oisanite

	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, 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

Refringence type

uniaxial

Refringence sign

negative

Birefringence

0.073

Refraction index $n_o$ (w)

2.561

Refraction index $n_e$ (e)

2.488

Pure color

colorless

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

Links

• Webmineral database: Anatase
• Wikipedia: Anatase
• Mindat: Anatase
• Handbook of Mineralogy (Min. Soc. Am): Anatase