CaF2 is a cubic single crystal. It has good transmission from UV to middle infrared wavelength. It is always used in excimer laser components. While, it is a little hygroscopic and susceptible to thermal shock.
Transmission Range: 170nm~7800nm
Thermal Expansion Coefficient: 18.85 x 10-6/K (20℃ to 60℃)
Density: 3.18 g/cm3