Iridium
Elemental State Ir
Electron Configuration 1s22s22p63s23p63d104s24p64d104f145s25p66s25d7
First Ionization Potential 8.967 eV
Electron Affinity 1.564 eV
Z*  
Pauling Electronegativity 2.2
Covalent Radius 1.37 Å
Metallic Radius 1.36 Å
Ionic Radius 0.82 Å Ir3+ coordination number = 6

0.765 Å Ir4+ coordination number = 6

0.71 Å Ir5+ coordination number = 6

van der Waal's Radius  
Melting Point 2446 oC
Boiling Point 4428 oC
Density 22.42 g/cm3
Other Properties