OPTICAL
	Transmission Range	1.2 to 15 microns
	Refractive Index	3.4223 at 5 microns
	Reflection Loss	51.0% at 5 µm (2 surfaces)
	Index of Absorption	1 x 10-3 cm-1 at 3 microns
	dN/dT	160 x 10-6/°C
	dN/dµ = 0	10.4µm
PHYSICAL
	Density	2.33 g/cm3
	Melting Point	1420°C
	Thermal Conductivity	163.3 Wm-1K-1 at 273K
	Thermal Expansion	4.15 x 10-6/°C
	Hardness	Knoop 1150
	Specific Heat Capacity	703 J kg-1K-1
	Dielectric Constant	13 at 10GHz
	Young's Modulus (E)	131 GPa
	Shear Modulus (G)	79.9 GPa
	Bulk Modulus (K)	102 GPa
	Elastic Coefficients	C11 = 167 C12 = 65 C44 = 80
	Poisson Ratio	0.266
CHEMICAL
	Solubility	Insoluble in water
	Molecular Weight	28.09
	Class/Structure	Cubic diamond, Fd3m

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