Formula TiO2
Growth method Verneuil technique
Max. sizes, (mm) Ø 25.4
Transmission range, (µm)
(Thickness 6 mm)
0.43 – 6.0
Structure tetragonal
Density (g/cm3) 4.25
Melting point (°C) 1840
Hardness (Mohs) 7
hermal expansion coefficient (10-6/K) vertical c-axis: 7.2
parallel c-axis: 9.9
Thermal conductivity (W m-1 K-1) 12.56
Specific heat capacity (J kg-1K-1) 710
Solubility in water (g/100 cm3)
Solubility in acids unessential
Solubility in organic solvents
Wavelength (µm)
Refractive index no
Refractive index ne
0.6
2.61
2.90
Absorption coefficient (cm-1)

Titanium Oxide (Rutile) for VIS and IR-range