Iridium
| Latin name | Iridium |
| English name | Iridium |
| chemical symbol | Ir |
| atomic number | 77 |
| relative atomic mass | 192,22 |
| period | 6 |
| group | VIII.B |
| classification | transition metals |
| discovery year | 1804 |
| discoverer | Tennant |
| melting point [°C] | 2410 |
| boiling point [°C] | 4130 |
| density [g cm-3] | 22,65 |
| density at melting point [g cm-3] | 19 |
| electronegativity [Pauling] | 2,2 |
| oxidation states | I ˜ VI, IX? |
| electron configuration | [Xe]4f14 5d7 6s2 |
| atomic radius [pm] | 180 |
| covalent radius [pm] | 137 |
| specific heat [J g-1K-1] | 0,13 |
| heat of fusion [kJ mol-1] | 26,1 |
| thermal conductivity [W m-1 K-1] | 150 |
| el. conductivity [S m-1] | 2,1.107 |
| 1. ionizing potential [eV] | 9,1 |
| Mohs hardness | 6,5 |
| Vickers hardness [MPa] | 1760 |
| Brinell hardness [MPa] | 1670 |
| shear modulus [GPa] | 210 |
| Young's modulus [GPa] | 528 |
| point of superconductivity [K] | 0,11 |
| state at normal conditions | solid |
Resources
- BARTHELMY, David. Mineral Species containing Iridium. In: Mineralogy database [online]. 2010 [cit. 2012-06-20]. Available from: http://webmineral.com/chem/Chem-Ir.shtml
- GINZBURG, Susanna. Analitičeskaja chimija platinovych metallov. Moskva: Nauka, 1972.
- LIVINGSTONE, Stanley. Chimija rutenija, rodija, palladija, osmija, iridija, platiny. Moskva: Mir, 1978.
- MELLOR, Joseph. Comprehensive Treatise on Inorganic and Theoretical Chemistry. Vol. 15. Londýn: Longmans, Green & Co., 1936.
- SLAVÍČEK, Petr; KOTEK, Jan. Návrh k opravě českého názvosloví chemického. Chem. Listy 104, 267-292 (2010).
- STWERTKA, Albert. A Guide to the Elements. Oxford: University Press, 2002. ISBN 0-19-515027-9.
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