Iridium
Electron Configuration: 2,8,18,32,15,2
Enthalpy of Fusion (kJ mol-1): 26.4
Enthalpy of Vaporisation (kJ mol-1): 612.1
Atomic Radii
Atomic Radius 135 pm
Bohr Radius 180 pm
Covalent Radius 137 pm
Van der Waals 0 pm
Oxidation States
Main Ir+3, Ir+4
Other Ir-1, Ir0, Ir+1, Ir+2, Ir+5, Ir+6
Ionisation Energies (kJ mol-1) show graph
M - M+ 880
M+ - M2+ 1680
M2+ - M3+ 2600
M3+ - M4+ 3800
M4+ - M5+ 5500
M5+ - M6+ 6900
M6+ - M7+ 8500
M7+ - M8+ 10000
M8+ - M9+ 11700