Samarium(III) oxide
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Samarium(III) oxide (Sm2O3) is a chemical compound. Samarium oxide readily forms on the surface of samarium metal under humid conditions or temperatures in excess of 150°C in dry air. Similar to rust on metallic iron, this oxide layer spalls off the surface of the metal, exposing more metal to continue the reaction. The oxide is commonly white to off yellow in color and is often encountered as a highly fine dust like powder.
This article relies largely or entirely on a single source. (March 2014) |
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
samarium(III) oxide | |
Other names
samarium sesquioxide, samaria | |
Identifiers | |
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.031.845 |
EC Number |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
Sm2O3 | |
Molar mass | 348.72 g/mol |
Appearance | yellow-white crystals |
Density | 8.347 g/cm3 |
Melting point | 2,335 °C (4,235 °F; 2,608 K) |
Boiling point | Not Stated |
insoluble | |
+1988.0·10−6 cm3/mol | |
Structure | |
Cubic, cI80 | |
Ia-3, No. 206 | |
Hazards | |
GHS labelling: | |
Warning | |
H319, H410 | |
P264, P273, P280, P305+P351+P338, P337+P313, P391, P501 | |
Related compounds | |
Other anions |
Samarium(III) chloride |
Other cations |
Promethium(III) oxide, Europium(III) oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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