Europium: Properties


Atomic

  • Atomic Mass: 151.965
  • Electronegativity:
    • Allred: 1.01
    • Absolute: <3.1 eV
  • Electron Affinity: <50 kJ mol-1
  • Polarizability: 27.7 3
  • Effective Nuclear Charge:
    • Slater: 2.85
    • Clementi: 8.11
    • Froese Fischer: 11.17
  • Radius:
    • Eu 2 +: 112 pm
    • Eu 3 +: 98 pm
    • Atomic: 204.2 pm
    • Covalent: 185 pm
  • Successive Ionization Energies:
    • Eu - Eu + : 546.7 kJ mol-1
    • Eu+1 - Eu+2 : 1085 kJ mol-1
    • Eu+2 - Eu+3 : 2404 kJ mol-1
    • Eu+3 - Eu+4 : 4110 kJ mol-1
  • Common Ions : Eu 2 +, Eu 3 +