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基本特性
Structure	Wurtzite (Hexagonal)
Density	5.81 g/ cm3
Young’s Modulus	5×1011 dyne/cm2
Coef. of Thermal Expansion (500 K)	α 1=6.26×10-6/K; α 3=4.28×10-6/K
Specific Heat	0.49 J/gK
Thermal conductivity (at 25 °C)	0.04 W/cmK
Max. Transmittance (λ =2.5-15 μm)	≥ 71 %
Absorption Coef. (λ =10.6 μm)	≤ 0.0015 cm-1 (including 2 surfaces)
Refractive index (λ =10.6 μm)	no= 2.4258, ne=2.4437
Max. single crystal diameter/length	?50.8×40 mm
Max. IR optic blank diameter/length	?50×50 mm or plate 60×60×6 mm
Surface quality	As-cut, 60/40 scratch*dig per MIL-0-13830

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