What is the uses of Strontium fluoride?

Strontium fluoride, SrF2, aswell alleged strontium difluoride and strontium(II) fluoride, is a fluoride of strontium. It is a abiding breakable white apparent solid with melting point of 1477°C and baking point 2460°C.
The solid adopts the fluorite structure. In the vapour appearance the SrF2 atom is non-linear with an F-Sr-F bend of about 120°.  This is an barring to VSEPR approach which would adumbrate a beeline structure. Ab initio calculations accept been cited to adduce that contributions from d orbitals in the carapace beneath the valence carapace are responsible. Another angle is that animosity of the electron amount of the strontium atom creates an about tetrahedral administration of allegation that interacts with the Sr-F bonds.
Properties
Strontium fluoride is about baffling in baptize (its Ksp amount is about 2.0x10-10 at 25 degrees Celsius.
It irritates eyes and skin, and is adverse if inhaled or ingested.
Similar to CaF2 and BaF2, SrF2 displays superionic application at animated temperatures.
Strontium fluoride is cellophane to ablaze in the wavelengths from exhaustion ultraviolet (150 nm) to bittersweet (11 μm). Its optical backdrop are average to calcium fluoride and barium fluoride.
Uses
Strontium fluoride is acclimated as an optical actual for a baby ambit of appropriate applications, for example, as an optical blanket on lenses and aswell as a thermoluminescent dosimeter crystal. Another use is as a carrier of strontium-90 radioisotope in radioisotope thermoelectric generators.
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