Calcium Tungstate ( CaWO4 )

Cadmium Cadmium
CdTe CdHgTe
Crystal properties
Application fields: IR optics, substrates, detectors,
crystal pieces for vacuum deposition.
Structure Cubic zincblende
Density 5.85 g/cm3
Knoop Hardness 45 kg/mm2
Young’s Modulus 3.7 x1011 dyne/cm2
Rupture Modulus 2.2 x108 dyne/cm2
Poisson Ratio 0.41
Coef. of Thermal Expansion 5.9 x 10-6/K
Specific Heat 0.21 J/gK
Thermal conductivity (at 25 oC) 0.06 W/cmK
Max. Transmittance (l =7-12 μm) 66 %
Absorption Coef. (l =10.6 μm) £ 0.003 cm-1 (including 2 surfaces)
Thermo-Optic Coef. (dn/dT) 11.0 (l =10.6 μm)
Refractive index (l =10.6 μm) 2.69
Max. IR-optic blank diameter/length l 40 x 45 mm
Max. single crystal diameter/length l 40 x 30 mm