Strontium oxide
| __ Sr2+ __ O2− | |
 |
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| Names | |
|---|---|
| IUPAC name
Strontium oxide
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|
| Other names
Strontia
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|
| Identifiers | |
1314-11-0  |
|
| EC Number | 215-219-9 |
| Jmol 3D model | Interactive image |
| PubChem | 73975 |
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| Properties | |
| SrO | |
| Molar mass | 103.619 g/mol |
| Appearance | colorless cubic crystals |
| Density | 4.70 g/cm3 |
| Melting point | 2,531 °C (4,588 °F; 2,804 K) |
| Boiling point | 3,200 °C (5,790 °F; 3,470 K) (decomposes) |
| reacts, forms Sr(OH)2 | |
| Solubility | miscible with potassium hydroxide slightly soluble in alcohol insoluble in acetone and ether |
|
Refractive index (nD)
|
1.810 [2] |
| Structure | |
| Halite (cubic), cF8 | |
| Fm3m, No. 225 | |
| Octahedral (Sr2+); octahedral (O2−) | |
| Thermochemistry | |
| 44.3 J·mol−1·K−1 | |
|
Std molar
entropy (S |
57.2 J·mol−1·K−1 |
|
Std enthalpy of
formation (ΔfH |
-592.0 kJ·mol−1 |
| Vapor pressure | {{{value}}} |
| Related compounds | |
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Other anions
|
Strontium sulfide |
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Other cations
|
Beryllium oxide Magnesium oxide Calcium oxide Barium oxide |
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Related compounds
|
Strontium hydroxide |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 verify (what is  ?) |
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| 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.
Contents
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(II) 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
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