Symbol Sm Atomic radius: pm 180 Fusion: kJ/Mole 8.62
Name Samarium Ionic radius: pm (+3)108 Boiling point: C 1794
Atomic number 62 Electron affinity - Melting point: C 1074
Atomic weight 150.4 1st  ion potential 5.64 Specific Heat Cap: J/(g K) 0.20
Classification Trans metal Natural form Solid Thermal Cond: W/(cm K) 0.13
Configuration [Xe]4f66s2 Crystal structure Rhom Electrical Cond 0.00956
Oxidation states 2,3 Density 7.52 Abundance: mg/kg-crust 7.05
Electronegativity 1.17 Vaporization: kJ/Mole 192.0    
Samarium was isolated as an impure oxide and spectroscopically identified as a new element in 1879 by P.-. Lecoq de Boisbaudran. Uses - alloys, headphones, making of permanent magnets, absorber in nuclear reactors