Strontium sulfide
 | |
| Names | |
|---|---|
| Other names
Strontium monosulfide C.I. 77847 | |
| Identifiers | |
1314-96-1  | |
| 3D model (Jmol) | Interactive image |
| ECHA InfoCard | 100.013.864 |
| PubChem | 14820 |
| |
| |
| Properties | |
| 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) |
| slightly soluble | |
| Solubility in acids | decomposes |
| Refractive index (nD) |
2.107 |
| Structure | |
| Halite (cubic), cF8 | |
| Fm3m, No. 225 | |
| Octahedral (Sr2+); octahedral (S2−) | |
| Hazards | |
| Safety data sheet | External MSDS |
| Related compounds | |
| Other anions |
Strontium oxide |
| Other cations |
Magnesium sulfide Calcium sulfide Barium sulfide |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is ?) | |
| 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 strontium sulfate, the main strontium ore called celestite, to other more useful compounds.[2]
Production and reactions
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
- ↑ Strontium sulfide, cameochemicals.noaa.gov
- 1 2 3 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.
- ↑ 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