Samarium(III) oxide

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Samarium(III) oxide

Names
IUPAC name samarium(III) oxide
Other names samarium sesquioxide, samaria
Identifiers
CAS Number	12060-58-1 Y
3D model (JSmol)	Interactive image Interactive image
ChemSpider	140199 Y
ECHA InfoCard	100.031.845
EC Number	235-043-6
PubChem CID	159425
UNII	91N8739X2N Y
CompTox Dashboard (EPA)	DTXSID30925575 DTXSID4051611, DTXSID30925575
InChI InChI=1S/3O.2Sm/q3*-2;2*+3 Y Key: FKTOIHSPIPYAPE-UHFFFAOYSA-N Y
SMILES O=[Sm]O[Sm]=O [Sm+3].[Sm+3].[O-2].[O-2].[O-2]
Properties
Chemical formula	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
Solubility in water	insoluble
Magnetic susceptibility (χ)	+1988.0·10−6 cm3/mol
Structure
Crystal structure	Cubic, cI80
Space group	Ia-3, No. 206
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H319, H410
Precautionary statements	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). N verify (what is YN ?) Infobox references

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.