| Element | Iridium | Symbol | Ir |
| Atomic Number | 77 | Molar Mass | 192.2 gmol-1 |
| Electron Configuration | [Xe]4f145d76s2 | Normal State | solid metal |
| Density @STP | 22.56 g cm-3 | Melting Point | 2446oC |
| Boiling Point | 4428oC | Stable Isotopes | 191Ir, 193Ir |
| Atomic Radius | 136 pm | Ionic Radius | 75 (3+) pm |
| Electronegativity (Pauling) | 2.2 | Ionization Energy (1st) | 880 kJ mol-1 |
| Ionization Energy (2nd) | 1680 kJ mol-1 | Ionization Energy (3rd) | 2600 kJ mol-1 |
| Molar Heat Capacity | 25.1 J K-1mol-1 | Standard Molar Entropy | 35.5 J K-1mol-1 |
| Enthalpy of Fusion | 26.4 kJ mol-1 | Enthalpy of Vapourization | 563.6 kJ mol-1 |