| Iron | |
| Elemental State | Fe |
| Electron Configuration | 1s22s22p63s23p64s23d6 |
| First Ionization Potential | 7.902 eV |
| Electron Affinity | 0.151 eV |
| Z* | 5.434 (Clementi-Raimondi) |
| Pauling Electronegativity | 1.83 |
| Covalent Radius | 1.20 Å |
| Metallic Radius | 1.26 Å |
| Ionic Radius | 0.77 Å Fe2+ coordination number
= 4; high spin
0.78 Å Fe2+ coordination number = 4, square planar; high spin 0.75 Å Fe2+ coordination number = 6; low spin 0.920 Å Fe2+ coordination number = 6; high spin 1.06 Å Fe2+ coordination number = 8; high spin 0.63 Å Fe3+ coordination number = 4; high spin 0.69 Å Fe3+ coordination number = 6; low spin 0.725 Å Fe4+ coordination number = 6 0.39 Å Fe6+ coordination number = 4 |
| van der Waal's Radius | |
| Melting Point | 1538 oC |
| Boiling Point | 2861 oC |
| Density | 7.874 g/cm3 |
| Other Properties | |