Tungsten
| Latin name | Wolframium |
| English name | Tungsten |
| chemical symbol | W |
| atomic number | 74 |
| relative atomic mass | 183,84 |
| period | 6 |
| group | VI.B |
| classification | transition metals |
| discovery year | 1783 |
| discoverer | F. Elhuijar |
| melting point [°C] | 3422 |
| boiling point [°C] | 5660 |
| density [g cm-3] | 19,3 |
| density at melting point [g cm-3] | 17,6 |
| electronegativity [Pauling] | 2,36 |
| oxidation states | II ˜ VI |
| electron configuration | [Xe]4f14 5d4 6s2 |
| atomic radius [pm] | 193 |
| covalent radius [pm] | 146 |
| specific heat [J g-1K-1] | 0,13 |
| heat of fusion [kJ mol-1] | 35,4 |
| thermal conductivity [W m-1 K-1] | 173 |
| el. conductivity [S m-1] | 1,8.107 |
| 1. ionizing potential [eV] | 7,98 |
| Mohs hardness | 7,5 |
| Vickers hardness [MPa] | 3430 |
| Brinell hardness [MPa] | 2570 |
| shear modulus [GPa] | 161 |
| Young's modulus [GPa] | 411 |
| point of superconductivity [K] | 0,015 |
| state at normal conditions | solid |
Resources
- AGTE, Curt; VACEK, Jiří. Wolfram a molybden. Praha: SNTL, 1954.
- BARTHELMY, David. Mineral Species containing Tungsten. In: Mineralogy database [online]. 2010 [cit. 2012-07-26]. Available from: http://webmineral.com/chem/Chem-W.shtml
- BRITISH GEOLOGICAL SURVEY. 2012. European Mineral Statistics 2006-10. Keyworth, Nottingham: British Geological Survey. ISBN 978-0-85272-698-3.
- BUSEV, Aleksej; IVANOV, Vadim; SOKOLOVA, Tatjana. Analitičeskaja chimija volframa. Moskva: Nauka, 1976.
- JIRÁSEK, J; VAVRO, M. Nerostné suroviny a jejich využití. Ostrava: Ministerstvo školství, mládeže a tělovýchovy ČR & Vysoká škola báňská - Technická univerzita Ostrava, 2008. ISBN 978-80-248-1378-3.
- LASSNER, Erik; SCHUBERT, Wolf-Dieter. Tungsten, properties, chemistry, technology of the element, alloys and chemical compounds. New York: Kluver academic/Plenum publishers, 1999. ISBN 0-306-45053-4.
- MELLOR, Joseph. Comprehensive Treatise on Inorganic and Theoretical Chemistry. Vol. 11. Londýn: Longmans, Green & Co., 1931.
- PERELMAN, Fanja; ZVORYKIN, Aleksandr. Molibden i volfram. Moskva: Nauka, 1968.
- REMY, Heinrich. Anorganická chemie - II. díl. 2. české vydání, dotisk. Praha: SNTL 1972, s. 195-209
- SHEDD, Kim. Tungsten. In: U.S. GEOLOGICAL SURVEY. Mineral Commodity Summaries [online]. 2013 [cit. 2013-03-03]. Available from: http://minerals.usgs.gov/.../mcs-2013-tungs.pdf
- STARÝ, Jaromír; SITENSKÝ, Ivo; HODKOVÁ, Tereza. Surovinové zdroje České republiky - Nerostné suroviny 2011. In: Česká geologická služba. Surovinové zdroje v ČR [online]. 2011 [cit. 2012-09-05]. Available from: http://www.geology.cz/.../rocenka2011sur.pdf
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