Iron

Atom properties


Radii


Ionic radius (Å): Fe(VI): 0.25 (4-coordinate) [1]
Fe(IV): 0.585 (6-coordinate) [1]
Fe(III): 0.55 (6-coordinate, low-spin) [1]
Fe(III): 0.645 (6-coordinate, high-spin) [1]
Fe(II): 0.61 (6-coordinate, low-spin) [1]
Fe(II): 0.78 (6-coordinate, high-spin) [1]


Electron configuration


Ground state: 1s2-2s2-2p6-3s2-3p6-3d6-4s2