Hafnium
Electron Configuration: 2,8,18,32,10,2
Enthalpy of Fusion (kJ mol-1): 25.5
Enthalpy of Vaporisation (kJ mol-1): 570.7
Atomic Radii
Atomic Radius 155 pm
Bohr Radius 208 pm
Covalent Radius 150 pm
Van der Waals 0 pm
Oxidation States
Main Hf+4
Other Hf+1, Hf+2, Hf+3
Ionisation Energies (kJ mol-1) show graph
M - M+ 642
M+ - M2+ 1440
M2+ - M3+ 2250
M3+ - M4+ 3216