Table 1.

Basic properties of the polymorphic forms of TiO₂ after [12–14]

Property	Anatase	Rutile
Density (g/cm3)	3.894	4.250
Space group	I41/amd	P42/mnm
Symmetry	tetragonal	tetragonal
Lattice parameters (nm)	a = 0.3784 c = 0.9515	a = 0.4594 c = 0.2959
Molecules/cell	4	2
Volume/molecule (·10−3nm3)	34.061	31.2160
Average static dielectric constant	48	110–117
Band gap energy [eV]	3.2–3.26	3.02–3.05
Work function [eV]	5.1	4.9
Transformation temperature	700–900 °C