Samarium: Properties


Atomic

  • Atomic Mass: 150.36
  • Electronegativity:
    • Pauling: 1.17
    • Allred: 1.07
    • Absolute: <3.1 eV
  • Electron Affinity: <50 kJ mol-1
  • Polarizability: 28.8 3
  • Effective Nuclear Charge:
    • Slater: 2.85
    • Clementi: 8.01
    • Froese Fischer: 11.06
  • Radius:
    • Sm 2 +: 111 pm
    • Sm 3 +: 100 pm
    • Atomic: 180.2 pm
    • Covalent: 166 pm
  • Successive Ionization Energies:
    • Sm - Sm + : 543.3 kJ mol-1
    • Sm+1 - Sm+2 : 1068 kJ mol-1
    • Sm+2 - Sm+3 : 2260 kJ mol-1
    • Sm+3 - Sm+4 : 3990 kJ mol-1
  • Common Ions : Sm 2 +, Sm 3 +