Osmium
Latin name | Osmium |
English name | Osmium |
chemical symbol | Os |
atomic number | 76 |
relative atomic mass | 190,23 |
period | 6 |
group | VIII.B |
classification | transition metals |
discovery year | 1803 |
discoverer | Tennant |
melting point [°C] | 3054 |
boiling point [°C] | 5027 |
density [g cm-3] | 22,66 |
density at melting point [g cm-3] | 20 |
electronegativity [Pauling] | 2,2 |
oxidation states | II, III, IV, VI, VIII |
electron configuration | [Xe]4f14 5d6 6s2 |
atomic radius [pm] | 185 |
covalent radius [pm] | 128 |
specific heat [J g-1K-1] | 0,13 |
heat of fusion [kJ mol-1] | 31,8 |
thermal conductivity [W m-1 K-1] | 87,6 |
el. conductivity [S m-1] | 1,23.107 |
1. ionizing potential [eV] | 8,7 |
Mohs hardness | 7 |
Brinell hardness [MPa] | 3920 |
shear modulus [GPa] | 222 |
point of superconductivity [K] | 0,66 |
state at normal conditions | solid |
Resources
- BARTHELMY, David. Mineral Species containing Osmium. In: Mineralogy database [online]. 2010 [cit. 2012-06-20]. Available from: http://webmineral.com/chem/Chem-Os.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.
- STWERTKA, Albert. A Guide to the Elements. Oxford: University Press, 2002. ISBN 0-19-515027-9.
- TICHÝ, Miloň. Toxikologie pro chemiky. 1. vyd. Praha: Karolinum, 1998, ISBN 80-7184-625-2.
rhenium ← osmium → iridium