SmarTeam

Sapphire

Optical Material Information*

Chemical Formula	Al2O3
Refractive Index (at 1.01 micron)	1.76
Knoop Hardness (psi)	1370
Modulus of Rupture (psi)	65,000
Useful Wavelength Range, Transmission (microns)	0.15-5.0
Useful Transmission Range, ATR	0.3-3.7
Maximum Useful Temperature (ºC)	1800
Melting Point (ºC)	2030
General properties	Hard; strong; useful at high temperatures; colorless.
Chemical Properties	Incompatible with strong acids and bases: insoluble in water; slightly soluble in acids and alkalis.
Clean with...	Alcohol, acetone, and 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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