Characteristic

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.

Chemical formula：SrF₂

Molar mass： 125.62 g/mol

Density：4.24 g/cm³

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

Application

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.