Ir
Iridium
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Ir |
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Iridium |
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| Atomic number | 77 |
| Atomic weight | 192.22 |
| Orbital electronic configuration | (Xe)4f145d76s2 |
| First ionization energy (eV) | 9.1 |
| Electronegativity (Pauling) | 2.20 |
| Atomic radius (Å) | 1.87 |
| Bonding radius (Å) | 1.27 |
| Oxidation states | 2, 3, 4, 6 |
Properties |
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| Density at 300K (g/ml) | 22.5 |
| Melting point (K) | 2716 |
| Boiling point (K) | 4716 |
| Heat of vaporization (kJ/mol) | 604.0 |
| Heat of fusion (kJ/mol) | 26.10 |
| Specific heat capacity (Jg-1K-1) | 0.130 |
| Crystal structure | cubic, face centered |