Crystal properties		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	nd = 2.613	ordinary ray
	nd = 2.909	extraordinary ray
	(nf - nc) = 0.164	ordinary ray
	(nf - nc) = 0.207	extraordinary ray
Birefringence	(nc - no) = 0.296
X-ray properties
Orientation	(100), (110), (001)