OPTICAL
	Transmission Range	1.8 to 23 microns
	Refractive Index	4.0026 at 11 microns
	Reflection Loss	59.1% at 11 µm (2 surfaces)
	Index of Absorption	1.3 x 10-3 cm-1 at 3.8 microns
	dN/dT	396 x 10-6/°C
	dN/dµ = 0	R.I. almost constant
PHYSICAL
	Density	5.33 g/cm3
	Melting Point	936°C
	Thermal Conductivity	58.61Wm-1K-1 at 293K
	Thermal Expansion	6.1 x 10-6/°C at 298K
	Hardness	Knoop 780
	Specific Heat Capacity	310 J kg-1K-1
	Dielectric Constant	16.6 at 9.37GHz at 300K
	Young's Modulus (E)	102.7 GPa
	Shear Modulus (G)	67 GPa
	Bulk Modulus (K)	77.2 GPa
	Elastic Coefficients	C11 = 129 C12 = 48.3 C44 = 67.1
		89.6 MPa (13000psi)
	Poisson Ratio	0.28
CHEMICAL
	Solubility	Insoluble in water
	Molecular Weight	72.59
	Class/Structure	Cubic diamond, Fd3m

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