### Atomic Data for Niobium (Nb)

### Atomic Number = 41

### Atomic Weight = 92.90638

### Reference = E95

    Isotope   Mass       Abundance Spin Mag Moment

    93Nb      92.906377  100%      9/2  +6.1705

    Nb I  Ground State 1s22s22p63s23p63d104s24p64d45s  6D1/2
          Ionization energy  54513.8 cm-1 (6.75885 eV)   Ref. RMBH87

    Nb II Ground State 1s22s22p63s23p63d104s24p64d4  5D0
          Ionization energy  113000 cm-1 (14.0 eV)   Ref. M52