Hafnium: Properties


Atomic

  • Atomic Mass: 178.49
  • Electronegativity:
    • Pauling: 1.3
    • Allred: 1.23
    • Absolute: 3.8 eV
  • Electron Affinity: 0 kJ mol-1
  • Polarizability: 16.2 3
  • Effective Nuclear Charge:
    • Slater: 3.15
    • Clementi: 9.16
    • Froese Fischer: 13.27
  • Radius:
    • Hf 4 +: 84 pm
    • Atomic: 156.4 pm
    • Covalent: 144 pm
  • Successive Ionization Energies:
    • Hf - Hf + : 642 kJ mol-1
    • Hf+1 - Hf+2 : 1440 kJ mol-1
    • Hf+2 - Hf+3 : 2250 kJ mol-1
    • Hf+3 - Hf+4 : 3216 kJ mol-1
  • Common Ions : Hf 4 +