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AMTIR is a medium refractive index material (2.4981 @ 10 microns) with good long wavelength transmission in the infrared spectral region. The primary use is as an acid resistant window or ATR element. In this application it will typically perform well in a pH range of 1–9. Although AMTIR contains arsenic and selenium it is considered safe to handle.
Melting Point: 405 °C
Density: 4.4 g/cm3
Solubility in H2O: 0 g/100 g at 20 °C
Hardness: 170 kg/mm2
Appearance: Red clear
Mid-IR Transmission – 1 mm thick AMTIR window
Mid-IR Transmission – 2 mm thick AMTIR window
Short Wavelength Limit: 11,000 cm-1 (1 mm)
Long Wavelength Limit: 593 cm-1 (1 mm), 625 cm-1 (4 mm)
AMTIR can be coated with a BBAR (broad band anti-reflective) coating. AMTIR may also be hard coated.
Short and Long Wavelength Ranges for which transmissivity is greater than 50% of stated crystal thickness.