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Zinc Selenide (Raytran, Irtran-4)

Optical Material Information*

Chemical Formula	ZnSe
Refractive Index (at 1.00 microns)	2.49
Knoop Hardness (psi)	150
Modulus of Rupture (psi)	8000
Useful Wavelength Range, Transmission (microns)	0.5-20
Useful Wavelength Range, ATR (microns)	0.5-14.3
Maximum Useful Temperature (ºC)	300
Melting Point (ºC)	1525
General properties	Withstands limited mechanical and thermal shock; can be cracked by uneven pressure; toxic; yellow.
Chemical Properties	Incompatible with acids and strong alkalis; insoluble in water and organic solvents; non-hygroscopic.
Clean with...	Alcohol, acetone, water.

*This was compiled from various sources. For more details, consult the Chemical Abstracts Service at www.cas.org.

Transmission Spectrum

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