Molecular Structure:

Molecular Formula: O₃Sm₂
Molecular Weight: 348.7182
IUPAC Name: oxygen(2-); samarium(3+)
Synonyms of Samarium oxide (CAS NO.12060-58-1): Disamarium trioxide ; EINECS 235-043-6 ; Samaria ; Samarium sesquioxide ; Samarium trioxide ; Samarium(3+) oxide ; Samarium(III) oxide ; Samarium oxide (Sm2O3)
CAS NO: 12060-58-1
Product Categories: Inorganics ; 62: Sm ; SamariumNanomaterials ; Nanomaterials ; Nanoparticles: Oxides, Nitrides, and Other CeramicsChemical Synthesis ; Nanopowders and Nanoparticle Dispersions ; Alternative Energy ; Catalysis and Inorganic Chemistry ; ElectrolytesChemical Synthesis ; Materials Science ; Oxides ; Samarium ; SamariumMetal and Ceramic Science ; Chemical Synthesis
Melting point: 2325 °C 
H bond acceptors: 3
Freely Rotating Bonds: 2
Polar Surface Area: 43.37 Å² 
Density: 8.35 g/mL at 25 °C
Refractive index: 1.97
Form: nanopowder

  Samarium oxide (CAS NO.12060-58-1) is used in optical and infrared absorbing glass to absorb infrared radiation. And it can be used as a neutron absorber in control rods for nuclear power reactors.

1. thermal decomposition of Samarium oxide (CAS NO.12060-58-1), nitrate, oxalate or sulfate:
     Sm₂(CO₃)₃ → Sm₂O₃ + 3CO₂
2. by burning the metal in air or oxygen at a temperature above 150 °C:
     4Sm + 3O₂ → 2Sm₂O₃

Safety Statements of Samarium oxide (CAS NO.12060-58-1): 22-24/25 
S22: Do not breathe dust. 
S24/25: Avoid contact with skin and eyes.
WGK Germany: 2
RTECS: VP3153000
F: 3-10-34