Strontium sulfide

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Strontium sulfide[1]
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Identifiers
CAS number 1314-96-1 YesY
PubChem 14820
Jmol-3D images Image 1
Properties
Molecular formula SrS
Molar mass 119.68 g/mol
Appearance Grey powder
Odor hydrogen sulfide
Density 3.70 g/cm3
Melting point 2,002 °C (3,636 °F; 2,275 K)
Solubility in water slightly soluble
Solubility in acids decomposes
Refractive index (nD) 2.107
Structure
Crystal structure Halite (cubic), cF8
Space group Fm3m, No. 225
Coordination
geometry
Octahedral (Sr2+); octahedral (S2–)
Hazards
MSDS External MSDS
EU Index Not listed
Related compounds
Other anions Strontium oxide
Other cations Magnesium sulfide
Calcium sulfide
Barium sulfide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Strontium sulfide is the inorganic compound with the formula SrS. It is a white solid. The compound is an intermediate in the conversion of strontuim sulfate, the main strotium ore called celestite, to other more useful compounds.[2]

Production and reactions[edit]

Strontium sulfide is produced by the reduction of the sulfate above 1000 °C:

SrSO4 + 2 C → SrS + 2 CO2

About 300,000 tons are processed in this way annually.[2] Both luminous and nonluminous sulfide phases are known, impurities, defects, and dopants being important.[3]

As expected for a sulfide salt of alkaline earth, the sulfide hydrolyzes readily:

SrS + 2 H2O → Sr(OH)2 + H2S

For this reason, samples of SrS have an odor of rotten eggs.

Similar reactions are used in the production of commercially useful compounds, including the most useful strontium compound, strontium carbonate.[2]

SrS + H2O + CO2 → SrCO3 + H2S

Strontium nitrate can also be prepared in this way.

References[edit]

  1. ^ Strontium sulfide, cameochemicals.noaa.gov
  2. ^ a b c J. Paul MacMillan, Jai Won Park, Rolf Gerstenberg, Heinz Wagner, Karl Köhler, Peter Wallbrecht “Strontium and Strontium Compounds” in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a25_321.
  3. ^ R. Ward, R. K. Osterheld, R. D. Rosenstein "Strontium Sulfide and Selenide Phosphors" Inorganic Syntheses, 1950, vol. III, pp. 11–24. doi:10.1002/9780470132340.ch4

External links[edit]