|
Name: Samarium
Symbol: Sm
Atomic Number: 62
Atomic Mass: 150.4 g
Number of Protons/Electrons: 62
Number of Neutrons: 88
Ionic Radius: Sm2+ / 1.11 Angstrom
Sm3+ / 0.964 Angstrom
Metal
Melting Point: 1073.0 °C
Boiling Point: 1778.0 °C
Density @ 293 K: 7.520 g/cm3
Oxide
Melting Point: 2325.0 °C
Density cubic C: 7.0883 g/cm3
Formula: Sm2O3
Molecular weight: 348.80 g
Metal %: 86.25
Toxicity LD 50.PO: (rat) > 1000 mg/kg
Dehydrated Carbonate
Formula *: Sm2(CO3)3
Molecular weight: 480.83 g
Oxide %: 72.5
Anhydrous Chloride
Formula *: SmCl3
Molecular weight: 256.76 g
Oxide %: 67.9
Toxicity LD 50.PO: (mouse) 2000 mg/kg
Anhydrous Fluoride
Formula *: SmF3
Molecular weight: 207.40 g
Oxide %: 84.1
Hydroxide
Formula *: Sm(OH)3
Molecular weight: 201.42 g
Oxide %: 86.6
Dehydrated Nitrate
Formula *: Sm(NO3)3
Molecular weight: 336.41 g
Oxide %: 51.85
Toxicity LD 50.PO: (rat) 2900 mg/kg
Dehydrated Oxalate
Formula *: Sm2(C2O4)3
Molecular weight: 564.86 g
Oxide %: 61.7
Anhydrous sulfate
Formula *: Sm2(SO4)3
Molecular weight: 588.97 g
Oxide %: 59.2
* theoretic data
| Isotope |
Half Life |
| Sm-144 |
Stable |
| Sm-145 |
340.0 days |
| Sm-146 |
1.03e8 years |
| Sm-147 |
1.06E11 years |
| Sm-148 |
7.0E15 years |
| Sm-149 |
Stable |
| Sm-150 |
Stable |
| Sm-151 |
90.0 years |
| Sm-152 |
Stable |
| Sm-153 |
1.92 days |
| Sm-154 |
Stable |
Date of discovery: 1879
Discoverer: Paul Emile Lecoq de Boisbaudran
|
 |
|
Markets and applications
Electronics:
Magnetism (permanent magnets),
M micro-waves filters,
SUPERAMIC™.
Applications:
for nuclear industry.
|
|
