· CAS:7440-19-9
· Molecular Formula: Sm
· Purity:99.9%
· Specification:- 100 mesh / - 200 mesh
· EINECS No.:231-128-7
· Hazardous Class:Class 4.1
UN No.:UN3089
Package Class:Vacuum Bag or with argon protection sealed
Samarium Metal (Sm)-Powder
Characteristic
Samarium is a chemical element with the symbol Sm and atomic number 62. Samarium has a silvery white luster. In air, it slowly oxidizes at room temperature and spontaneously ignites at 150°C.
Phase at STP： solid
Melting point： 1345 K (1072 °C, 1962 °F)
Boiling point： 2173 K (1900 °C, 3452 °F)
Density (near r.t.)： 7.52 g/cm3
when liquid (at m.p.)： 7.16 g/cm3
Heat of fusion： 8.62 kJ/mol
Heat of vaporization： 192 kJ/mol
Molar heat capacity： 29.54 J/(mol·K)
Chemical Composition
Rare Earth Impurity(≤) | Sm/RE | ≥99.9% |
Item | La/RE | Ce/RE | Pr/RE | Nd/RE | Eu/RE | Gd/RE | Tb/RE |
Content(%) | 0.0055 | 0.0010 | 0.0010 | 0.0010 | 0.0010 | 0.0010 | 0.0010 |
Item | Dy/RE | Ho/RE | Er/RE | Tm/RE | Yb/RE | Lu/RE | Y/RE |
Content(%) | 0.0010 | 0.0010 | 0.0010 | 0.0010 | 0.0010 | 0.0010 | 0.0010 |
Non-Rare Earth Impurity(≤) | RE | ≥99% |
Item | Fe | Si | Al | Ca | Mg | Cl | C |
Content(%) | 0.0058 | 0.0013 | 0.0005 | 0.0072 | 0.0037 | 0.0085 | 0.0400 |
Application
The major commercial application of samarium is in samarium–cobalt magnets, which have pone of the highest resistances to demagnetization known.
Samarium-149 has high cross-section for neutron capture (41,000 barns) and is therefore used in the control rods of nuclear reactors.
Other applications of samarium include catalysis of chemical reactions, radioactive dating and X-ray lasers.
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