Back هقزافلورید تکنسیوم AZB Fluorid techneciový Czech Technetium(VI)-fluorid German هگزافلورید تکنسیم Persian Teknetiumheksafluoridi Finnish Hexafluorure de technétium French 六フッ化テクネチウム Japanese Technetium(VI)fluoride Dutch Fluoreto de tecnécio(VI) Portuguese Фторид технеция(VI) Russian
| |
| Identifiers | |
|---|---|
3D model (JSmol)
|
|
| ChemSpider | |
PubChem CID
|
|
| |
| |
| Properties | |
| TcF6 | |
| Molar mass | 212 g/mol (98Tc) |
| Appearance | golden-yellow crystals[1] |
| Density | 3,58 g/cm3 (−140 °C), solid[2] |
| Melting point | 37.4 °C (99.3 °F; 310.5 K)[1] |
| Boiling point | 55.3 °C (131.5 °F; 328.4 K)[1] |
| Structure | |
| cubic | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Technetium hexafluoride or technetium(VI) fluoride (TcF6) is a yellow inorganic compound with a low melting point. It was first identified in 1961.[3] In this compound, technetium has an oxidation state of +6, the highest oxidation state found in the technetium halides. In this respect, technetium differs from rhenium, which forms a heptafluoride, ReF7.[4] Technetium hexafluoride occurs as an impurity in uranium hexafluoride, as technetium is a fission product of uranium (spontaneous fission in natural uranium, possible contamination from induced fission inside the reactor in reprocessed uranium). The fact that the boiling point of the hexafluorides of uranium and technetium are very close to each other presents a problem in using fluoride volatility in nuclear reprocessing.
- ^ a b c CRC Handbook of Chemistry and Physics, 90th Edition, CRC Press, Boca Raton, Florida, 2009, ISBN 978-1-4200-9084-0, Section 4, Physical Constants of Inorganic Compounds, p. 4-93.
- ^ Drews, T.; Supeł, J.; Hagenbach, A.; Seppelt, K. (2006). "Solid State Molecular Structures of Transition Metal Hexafluorides". Inorganic Chemistry. 45 (9): 3782–3788. doi:10.1021/ic052029f. PMID 16634614.
- ^ Selig, H.; Chernick, C.L.; Malm, J.G. (1961). "The Preparation and Properties of TcF6". Journal of Inorganic and Nuclear Chemistry. 19 (3–4): 377–381. doi:10.1016/0022-1902(61)80132-2.
- ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.