Names | |
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IUPAC name
Strontium oxide
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Other names
Strontia
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Identifiers | |
3D model (JSmol)
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ECHA InfoCard | 100.013.837 |
EC Number |
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PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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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 |
−35.0·10−6 cm3/mol | |
Refractive index (nD)
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1.810 [2] |
Structure | |
Halite (cubic), cF8 | |
Fm3m, No. 225 | |
Octahedral (Sr2+); octahedral (O2−) | |
Thermochemistry | |
Heat capacity (C)
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44.3 J·mol−1·K−1 |
Std molar
entropy (S⦵298) |
57.2 J·mol−1·K−1 |
Std enthalpy of
formation (ΔfH⦵298) |
-592.0 kJ·mol−1 |
Hazards | |
Flash point | Non-flammable |
Related compounds | |
Other anions
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Strontium sulfide |
Other cations
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Beryllium oxide Magnesium oxide Calcium oxide Barium oxide |
Related compounds
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Strontium hydroxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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.