Mateck Window Grade Zinc Selenide, ZnSe

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Mateck Window Grade Zinc Selenide, ZnSe
Categories:	Ceramic; Sulfide/Chalcogenide; Other Engineering Material; Semiconductor
Material Notes:	Optical Crystals
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Physical Properties	Metric	English	Comments

Density	5.26 g/cc @Temperature 20.0 °C	0.190 lb/in³ @Temperature 68.0 °F
Solubility	0.00 ppm	0.00 ppm
a Lattice Constant	5.668 Å	5.668 Å
Molecular Weight	144.33 g/mol	144.33 g/mol

Mechanical Properties	Metric	English	Comments
Vickers Microhardness	1000	1000	MPa
Hardness, Mohs	4.0	4.0
Modulus of Elasticity	77.6 GPa	11300 ksi
Poissons Ratio	0.311	0.311
Shear Modulus	29.6 GPa	4290 ksi

Thermal Properties	Metric	English	Comments
CTE, linear	7.90 µm/m-°C @Temperature 27.0 °C	4.39 µin/in-°F @Temperature 80.6 °F
Specific Heat Capacity	0.367 J/g-°C	0.0877 BTU/lb-°F
Thermal Conductivity	14.1 W/m-K	97.9 BTU-in/hr-ft²-°F
Melting Point	1505 - 1535 °C	2741 - 2795 °F

Optical Properties	Metric	English	Comments
Refractive Index	2.4034	2.4034	at n10.6
	1.3936 @Wavelength 12000 nm	1.3936 @Wavelength 12000 nm
	2.3662 @Wavelength 15000 nm	2.3662 @Wavelength 15000 nm
	2.4067 @Wavelength 10000 nm	2.4067 @Wavelength 10000 nm
	2.4376 @Wavelength 3000 nm	2.4376 @Wavelength 3000 nm
	2.4894 @Wavelength 1000 nm	2.4894 @Wavelength 1000 nm
	2.6645 @Wavelength 546.1 nm	2.6645 @Wavelength 546.1 nm	at ne
Transmission, Visible	65 % @Wavelength 500 nm	65 % @Wavelength 500 nm	Internal Transmittance
IR Transmittance	16 % @Wavelength 20000 nm	16 % @Wavelength 20000 nm	Internal Transmittance
	90 % @Wavelength 15000 nm	90 % @Wavelength 15000 nm	Internal Transmittance
	97 % @Wavelength 5000 nm	97 % @Wavelength 5000 nm	Internal Transmittance
	98 % @Wavelength 12000 nm	98 % @Wavelength 12000 nm	Internal Transmittance

Descriptive Properties
Symmetry	cubic
Symmetry Class	43m
Thermal Coefficient of Refractive Index	6E-5 to 6.63E-5		at 3.39 microns for ± 60°C
Thermal Stability, °C	57±7
Transmission Range (microns)	0.55 - 18

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CMAT058 / 87742

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