Date of Discovery: 1879
Discoverer: Paul Emile Lecoq de Boisbaudran
Name Origin: smarskite (mineral)
Uses: Used in magnets, in alloys with cobalt, and nuclear reactors
Obtained From: Found with other rare earths

 
Atomic Number: 62
Atomic Mass: 150.36 amu
Melting Point: 1072.0 °C (1345.15 °K, 1961.6 °F)
Boiling Point: 1900.0 °C (2173.15 °K, 3452.0 °F)
Crystal Structure: Rhombohedral
Density @ 293 K: 7.54 g/cm3
Color: Silver

 
Isotope
Sm-144
Sm-145
Sm-146
Sm-147
Sm-148
Sm-149
Sm-150
Sm-151
Sm-152
Sm-153
Sm-154
Half Life
Stable
340.0 days
1.03E8 years
1.06E11 years
7.0E15 years
Stable
Stable
90.0 years
Stable
1.92 days
Stable