Titanium Dioxide Rutile type
TiO2
Chemical name
Titanium Dioxide Rutile type
Mineral name
Rutile
Chemical formula
TiO2
Melting point [°C]
1825
Crystal system
tetragonal
Unit cell
a [Å]:4.593
b [Å]:4.593
c [Å]:2.959
Twinning
Type a) optical grade, grain boundary free; Type h) electronic grade, with domain structure
Mohs hardness
6.5 - 7
Density [g/cm3]
4.26
Color
slight yellow, transparent
Streak
white
Refractive Index
nd=2.613 (ordinary ray); nd=2.909 (extraordinary ray); (nf - nc)=0.164 (ordinary ray); (nf - nc)=0.207 (extraordinary ray); (nc - n0)=0.296
Piezoelectric crystals
 
thermal expansation coefficient [(10^(-5))/K]
0.9943 || c-axis; 0.7192 ^c-axis
 
Crystal growth method
flame fusion method
Crystal growth orientation
(001), (110)
Maximum size
up to Æ 1.5 inch * 2 inch length
Variations
doped crystals (Fe, Nb, W, Ta, V), other dopands on request
Dielectric constant
190 || c-axis; 85 ^c-axis
Dielectric loss tangent (10 GHz)
17^10^(-3)
Specific resistivity [W/cm]
>10^13
Transmission range
0.42-6.0 μm
Orientation
(100), (110), (001)