Calcium fluoride is used in the manufacture of optical components such as windows and lenses for thermal imaging systems, spectroscopy, telescopes and excimer lasers (in the form of fused lenses for lithography). It is transparent over a broad range of frequencies from ultraviolet (UV) to infrared (IR). Its low refractive index reduces the need for anti-reflective coatings. Its insolubility in water is also handy. [citation needed] It also allows smaller wavelengths to pass. [citation needed]
Doped calcium fluoride, like natural fluorite, exhibits thermoluminescence and is used in thermoluminescent dosimeters. Formed when fluorine combines with calcium.
CaF2 is classified as "non-hazardous," although it reacts with sulfuric acid to produce highly toxic hydrofluoric acid. For inhalation, the NIOSH recommended airborne concentration of fluorinated dust is 2.5 mg/m3.
calcium fluoride. Occurs in nature in the form of the mineral fluorite or fluorite. It is the main source of fluorine and its compounds. Pure calcium fluoride is used as a catalyst for dehydration and dehydrogenation and for fluoridation of drinking water.
Calcium difluoride is a calcium salt, an inorganic calcium salt.
