OPTICAL
	Transmission Range	0.21 to 20 microns
	Refractive Index	1.45644 at 10 microns
	Reflection Loss	6.8% at 10 µm (2 surfaces)
	Index of Absorption	1.22 x 10-3 cm-1 at 2.7µm
	Restrahlen Peak	63.1 microns
	dN/dT	-33.2 x 10-6/°C
PHYSICAL
	Density	1.99 g/cm3
	Melting Point	776°C
	Thermal Conductivity	6.53Wm-1K-1 at 322K
	Thermal Expansion	36 x 10-6/K at 300K
	Hardness	Knoop 7.2 <110>, 9.3 <100> with 200g
	Specific Heat Capacity	690 J kg-1K-1
	Dielectric Constant	4.64 at 1MHz at 300K
	Young's Modulus (E)	29.67 GPa
	Shear Modulus (G)	6.24 GPa
	Bulk Modulus (K)	17.36 GPa
	Elastic Coefficients	C11 = 39.8 C12 = 6.2 C44 = 6.25
	Apparent Elastic Limit	2.3 MPa (330psi)
	Poisson Ratio	0.216
CHEMICAL
	Solubility	34.7g/100g water
	Molecular Weight	74.55
	Class/Structure	Cubic FCC, NaCl, Fm3m, (100) cleavage

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