| Strontium oxide[1] | |
|---|---|
| __ Sr2+ __ O2- | |
| Archivo:NaCl polyhedra.png | |
| IUPAC name | Strontium oxide |
| Other names | Strontia |
| Identifiers | |
| CAS number | 1314-11-0 |
| Properties | |
| Molecular formula | SrO |
| Molar mass | 103.62 g/mol |
| Appearance | colorless cubic crystals |
| Density | 4.70 g/cm3 |
| Melting point |
2531°C |
| Boiling point |
> 3000 °C (decomp) |
| Solubility in water | reacts, forms Sr(OH)2 |
| Solubility | miscible with caustic potash slightly soluble in alcohol insoluble in acetone and ether |
| Refractive index (nD) | 1.810 [2] |
| Structure | |
| Crystal structure | Halite (cubic), cF8 |
| Space group | Fm3m, No. 225 |
| Coordination geometry |
Octahedral (Sr2+); octahedral (O2–) |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
-592.0 kJ·mol−1 |
| Standard molar entropy S |
57.2 J·mol−1·K−1 |
| Specific heat capacity, C | 44.3 J·mol−1·K−1 |
| Hazards | |
| EU Index | Not listed |
| Flash point | Non-flammable |
| Related compounds | |
| Other anions | Strontium sulfide |
| Other cations | Beryllium oxide Magnesium oxide Calcium oxide Barium oxide |
| Related compounds | Strontium hydroxide |
 (what is this?) (verify)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
| Infobox references | |
Strontium oxide or strontia, SrO, is formed when strontium reacts with oxygen. Burning strontium in air results in a mixture of strontium oxide and strontium nitride. It also forms from the decomposition of strontium carbonate SrCO3. It is a strongly basic oxide.
Uses[]
About 8% by weight of television picture tube glass is strontium oxide, which has been the major use of strontium since 1970.[3] Color televisions and other devices containing color cathode ray tubes sold in the United States are required by law to use strontium in the faceplate to block X-ray emission (these X-ray emitting TV's are no longer in production). Lead oxide can be used in the neck and funnel, but causes discoloration when used in the faceplate.[4]
Reactions[]
Elemental strontium is formed when strontium oxide is heated with aluminium in a vacuum.[1]
References[]
- ↑ 1,0 1,1 Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–87. ISBN 0849305942.
- ↑ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0070494398
- ↑ Mineral Yearbook 2007:Strontium. United States Geological Survey. Retrieved on 2009-09-14.
- ↑ (2006). "The characterization of waste cathode-ray tube glass.". Waste management 26 (12): 1468–76. DOI:10.1016/j.wasman.2005.11.017. PMID 16427267. ISSN 0956-053X.
External links[]
Plantilla:Strontium compounds
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