OPTICAL
	Transmission Range	0.37 to 13.5 microns
	Refractive Index	2.20084 at 10 microns
	Reflection Loss	26.2% at 10 µm (2 surfaces)
	Index of Absorption	0.0006 cm-1 at 3.8 microns
	Restrahlen Peak	30.5 microns
	dN/dT	+38.7 x 10-6/°C at 3.39µm
PHYSICAL
	Density	4.09 g/cm3
	Melting Point	1765°C (dissociates about 700°C)
	Thermal Conductivity	27.2 Wm-1K-1 at 298K
	Thermal Expansion	6.5 x 10-6/°C at 273K
	Hardness	Knoop 160 with 50g indenter
	Specific Heat Capacity	515 J kg-1K-1
	Dielectric Constant	8
	Young's Modulus (E)	74.5 GPa
	Apparent Elastic Limit	68.9 MPa (10,000psi)
	Poisson Ratio	0.28
CHEMICAL
	Solubility	0.001 g/100g water
	Molecular Weight	144.33
	Class/Structure	HIP polycrystalline cubic, ZnS, F43m

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