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Strontium fluoride

strontium fluoride
Systematic name Strontium fluoride
Other names Strontium difluoride
Strontium(II) fluoride
Molecular formula SrF2
Molar mass 125.62 g/mol
Density 4.24 g/cm3
Solubility (water) 0.039 g/100 g
Melting point 1477 °C
Boiling point 2460 °C
CAS number [7783-48-4]
EINECS number -
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references

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 forms face-centered cubic crystals, with structure of calcium fluoride. It is almost insoluble in water (its Ksp value is approximately 4.33x10-9 at 25 degrees Celsius. Its CAS number is [7783-48-4].

Strontium fluoride is prepared by reaction of strontium chloride with fluorine gas, or by action of hydrofluoric acid on strontium carbonate. It irritates eyes and skin, and is harmful when inhaled or ingested.

Strontium fluoride is used as an optical material transparent from vacuum ultraviolet (150 nm) to infrared (11 µm) for a small range of special applications. Its optical properties are intermediate to calcium fluoride and barium fluoride.[1] It is also used as an optical coating on lenses.

Strontium fluoride can be used as a thermoluminescent dosimeter crystal.

One of the uses of strontium fluoride is as a carrier of strontium-90 radioisotope in radioisotope thermoelectric generators.

Similar to CaF2 and BaF2, SrF2 displays superionic conductivity at elevated temperatures.[2]


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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Strontium_fluoride". A list of authors is available in Wikipedia.
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