Strontium fluoride, SrF2, also called strontium difluoride and strontium(II) fluoride, is a fluoride of strontium. It is a stable brittle white crystalline solid with melting point of 1477 °C and boiling point 2460 °C. It appears as the mineral strontiofluorite.
Molar mass： 125.62 g/mol
Melting point：1,477 °C (2,691 °F; 1,750 K)
Boiling point：2,460 °C (4,460 °F; 2,730 K)
Solubility in water：0.039 g/100 mL
Magnetic susceptibility (χ)：−37.2·10−6 cm3/mol
Refractive index (nD)：1.439 @0.58 µm
Crystal structure：cubic crystal system, cF12
Strontium fluoride is used as an optical material for a small range of special applications, for example, as an optical coating on lenses and also as a thermoluminescent dosimeter crystal.
Another use is as a carrier of strontium-90 radioisotope in radioisotope thermoelectric generators.