Hafnium
Elemental State Hf
Electron Configuration 1s22s22p63s23p63d104s24p64d104f145s25p66s25d2
First Ionization Potential 6.825 eV
Electron Affinity ~0 eV (calculated)
Z*  
Pauling Electronegativity 1.3
Covalent Radius 1.49 Å
Metallic Radius 1.59 Å
Ionic Radius 0.72 Å Hf 4+ coordination number = 4

0.85 Å Hf 4+ coordination number = 6

van der Waal's Radius  
Melting Point 2233 oC
Boiling Point 4603 oC
Density 13.31 g/cm3
Other Properties