Isotope Mass Abundance Spin Mag Moment
176Hf 175.941406 5.21% 0 177Hf 176.943217 18.6% 7/2 +0.7935 178Hf 177.943696 27.30% 0 179Hf 178.945812 13.63% 9/2 -0.6409 180Hf 179.946545 35.10% 0
Hf I Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d26s2 3F2 Ionization energy 55047.9 cm-1 (6.82507 eV) Ref. CHR88b Hf II Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d6s2 2P°3/2 Ionization energy 120000 cm-1 (15 eV) Ref. M58