| Niobium | |
| Elemental State | Nb |
| Electron Configuration | 1s22s22p63s23p63d104s24p65s14d4 |
| First Ionization Potential | 6.759 eV |
| Electron Affinity | 0.893 eV |
| Z* | |
| Pauling Electronegativity | 1.6 |
| Covalent Radius | 1.37 Å |
| Metallic Radius | 1.47 Å |
| Ionic Radius | 0.86 Å Nb3+ coordination number
= 6
0.82 Å Nb4+ coordination number = 6 0.62 Å Nb5+ coordination number = 4 0.78 Å Nb5+ coordination number = 6 0.88 Å Nb5+ coordination number = 8 |
| van der Waal's Radius | |
| Melting Point | 2477 oC |
| Boiling Point | 4744 oC |
| Density | 8.57 g/cm3 |
| Other Properties | |