Table 1 Basic properties of the polymorphic forms of TiO2 after [12–14]
From: TiO2-Based Nanomaterials for Gas Sensing—Influence of Anatase and Rutile Contributions
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 | |