Rubidium
| Latin name | Rubidium |
| English name | Rubidium |
| chemical symbol | Rb |
| atomic number | 37 |
| relative atomic mass | 85,4678 |
| period | 5 |
| group | I.A |
| classification | alkaline metals |
| discovery year | 1861 |
| discoverer | W. Bunsen, G. R. Kirchhoff |
| melting point [°C] | 38,89 |
| boiling point [°C] | 686 |
| critical temperature [°C] | 1820 |
| critical pressure [MPa] | 16 |
| density [g cm-3] | 1,53 |
| density at melting point [g cm-3] | 1,46 |
| electronegativity [Pauling] | 0,82 |
| stand. el. potential [V] | −2,98 |
| oxidation states | I |
| electron configuration | [Kr]5s1 |
| atomic radius [pm] | 265 |
| covalent radius [pm] | 211 |
| specific heat [J g-1K-1] | 0,363 |
| heat of fusion [kJ mol-1] | 2,192 |
| thermal conductivity [W m-1 K-1] | 58,2 |
| el. conductivity [S m-1] | 4,78.107 |
| 1. ionizing potential [eV] | 4,1771 |
| 2. ionizing potential [eV] | 27,28 |
| 3. ionizing potential [eV] | 40,0 |
| Mohs hardness | 0,3 |
| Brinell hardness [MPa] | 0,216 |
| Young's modulus [GPa] | 2,4 |
| state at normal conditions | solid |
Rubidium is a soft, silvery-white metallic element.
Resources
- BARTHELMY, David. Mineral Species containing Rubidium. In: Mineralogy database [online]. 2010 [cit. 2012-06-20]. Available from: http://webmineral.com/chem/Chem-Rb.shtml
- JURSÍK, František. Anorganická chemie kovů. 1. vyd. Praha: Vysoká škola chemicko-technologická, 2002. ISBN 80-7080-504-8.
- KOGAN, Boris; et al. Rubidij i cezij. Moskva: Nauka, 1971.
- MELLOR, Joseph. Comprehensive Treatise on Inorganic and Theoretical Chemistry. Vol. 2. Londýn: Longmans, Green & Co., 1922.
- PEREĽMAN, Fania, Moiseevna. Rubidium and caesium. Oxford: Pergamon Press, 1965.
- STARÝ, Jaromír; SITENSKÝ, Ivo; HODKOVÁ, Tereza. Surovinové zdroje České republiky - Nerostné suroviny 2011. In: Česká geologická služba. Surovinové zdroje v ČR [online]. 2011 [cit. 2012-07-25]. Available from http://www.geology.cz/.../rocenka2011sur.pdf
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