Uranyl fluoride
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| Names | |
|---|---|
| IUPAC name
Uranium(VI) difluoride dioxide | |
Other names
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| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.033.529 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| UO2F2 | |
| Molar mass | 308.024 g·mol−1 |
| Appearance | yellow solid[1] |
| Density | 6.37 g/cm3[2] |
| very soluble | |
| Hazards | |
| GHS labelling: | |
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| Danger | |
| H300, H330, H373, H411 | |
| Related compounds | |
Related compounds |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Uranyl fluoride is the inorganic compound with the formula UO2F2. It is most notable as a contaminant in the production of uranium tetrafluoride.[3]
As shown by X-ray crystallography, the uranyl centers UO2+2 are surrounded by six fluoride ligands F−.[4]
Synthesis
[edit]It is formed in the hydrolysis of uranium hexafluoride (UF6):
- UF6 + 2 H2O → UO2F2 + 4 HF
It can also be formed in the hydrofluorination of uranium trioxide (UO3):
- UO3 + 2 HF → UO2F2 + H2O[5]
Physical properties
[edit]This salt is very soluble in water as well as hygroscopic.[1] It changes in color from brilliant orange to yellow upon hydration. Starting around 300 °C, hydrolysis by the water vapor in air becomes significant, resulting in HF fumes.[citation needed]
References
[edit]- 1 2 Perry, Dale L. (2016-04-19). Handbook of Inorganic Compounds. CRC Press. p. 448. ISBN 978-1-4398-1462-8.
- ↑ "Uranyl Fluoride". International Bio-Analytical Industries, Inc.
- ↑ Peehs, Martin; Walter, Thomas; Walter, Sabine; Zemek, Martin (2007). "Uranium, Uranium Alloys, and Uranium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a27_281.pub2. ISBN 978-3-527-30385-4.
- ↑ Zachariasen, W. H. (1948). "Crystal chemical studies of the 5f-series of elements. III. A study of the disorder in the crystal structure of anhydrous uranyl fluoride". Acta Crystallographica. 1 (6): 277–281. Bibcode:1948AcCry...1..277Z. doi:10.1107/S0365110X48000764.
- ↑ Jang, Harry; Louis-Jean, James; Poineau, Frederic (2023-06-20). "Synthesis and Morphological Control of UO2F2 Particulates". ACS Omega. 8 (24): 21996–22002. doi:10.1021/acsomega.3c01999. ISSN 2470-1343. PMC 10286299. PMID 37360455.
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