Constituent
- Name
- Brookite
- IMA name
- Brookite
- Class
- non-silicate mineral
- Compound type
- oxide-hydroxide
- Relevance
- main - major
- Arrangement
- single phase
- Mass fraction
- 1.0
- Formula
- TiO$_{2}$
- Chemical formula
- TiO2
- Elemental formula
- Ti O2
- Isotope mixture type
- terrestrial abundance
- 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.10
Dana
- Major class
- oxides and hydroxides (III)
- Class
- simple oxides (04)
- Type
- with a cation charge of 4+ (A++++O2) (04.04)
- Group
- -Brookite- group (04.04.05)
- Code
- 04.04.05.01
- Phase type
- crystalline
- Crystal system
- orthorhombic
- Crystal class
- dipyramidal
- Crystal class symbol
- mmm (D2h)
- Crystal spacegroup
- Pbca
- Molar mass
- 79.88 $g/mol$
- Density
- 4.10 - 4.14 $g/cm^3$
- Refringence type
- biaxial
- Refringence sign
- positive
- Birefringence
- 0.122 - 0.157
- Refraction index $n_{\alpha}$
- 2.583 - 2.584
- Refraction index $n_{\beta}$
- 2.584 - 5.588
- Refraction index $n_{\gamma}$
- 2.705 - 2.741
- Dispersion V
- r > v, very strong, with crossed axial dispersion
- Color
- light brown, yellowish brown, orange, dark reddish brown, brown, dark brown
- Diaphaneity
- transparent to opaque
- Luster
- submetallic