Titanium dioxide ( TiO2 )

RUTILE ATR PRISMS

Crystal properties

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

Crystallographic properties

Crystallographic structure

Tetragonal
a = b = 4.593 Å
c = 2.959 Å

Twinning structure

Type a) Optical grade, grain  boundaryfree
Type h) Electronic grade, with  domain structure

Colour

Slight Yellow, transparent

Physical properties

Density 

4.26 g/m³

Melting point

1825 °C

Hardness

6.5 - 7 (Mohs)

Thermal expansion coefficient

9.943 * 10^-6 K^-1
7.192 * 10^-6 K^-1

|| c-axis
^c-axis

Physical properties cont.

Dielectric constant

190
85

|| c-axis
^ c-axis

Dielectric loss tangent

17 * 10^-3

Specific resistivity

> 10¹³ W/cm

Optical properties

Transmission range

0.42 to 6.0 µm

Refraction index

n_d = 2.613

ordinary ray

n_d = 2.909

extraordinary ray

(n_f - n_c) = 0.164

ordinary ray

(n_f - n_c) = 0.207

extraordinary ray

Birefringence

(n_c - n_o) = 0.296

X-ray properties

Orientation

(100), (110), (001)