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Thallium Bromoiodide (KRS-5)

Optical Material Information*

Chemical Formula	TIBr-TlI
Refractive Index (at 1.00 microns)	2.45
Knoop Hardness (psi)	40
Modulus of Rupture (psi)	3800
Useful Wavelength Range, Transmission (microns)	0.6-60
Useful Wavelength Range, ATR (microns)	0.7-30
Maximum Useful Temperature (ºC)	200
Melting Point (ºC)	414.5
General properties	Deforms under pressure; temperature sensitive; toxic; does not easily fracture; waxy quality; tendency to cold flow; reddish-orange.
Chemical Properties	Incompatible with complexing agents; soluble in bases; incompatible with solutions of ammonium salts; slightly soluble in water.
Clean with...	MEK.

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

Transmission Spectrum

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