Uranyl fluoride

Uranyl fluoride
	Uranyl fluoride
Names
	IUPAC name Uranium(VI) difluoride dioxide
	Other names Uranyl difluoride
Identifiers
CAS Number	13536-84-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	4937337;
ECHA InfoCard	100.033.529
EC Number	236-898-8;
PubChem CID	6432077;
CompTox Dashboard (EPA)	DTXSID9065528 ;
	InChI InChI=1S/2FH.2O.U/h2*1H;;;/q;;;;+2/p-2 Key: KCKICANVXIVOLK-UHFFFAOYSA-L;
	SMILES O=[U+2]=O.[F-].[F-];
Properties
Chemical formula	UO2F2
Molar mass	308.024 g·mol−1
Appearance	brilliant orange solid[citation needed]
Density	6.37 g/cm3
Melting point	?
Boiling point	?
Solubility in water	very soluble
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H330, H373, H411
Related compounds
Related compounds	Uranyl bromide; Uranyl chloride; Neptunyl fluoride; Plutonyl fluoride; Plutonyl chloride;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Uranyl fluoride is the inorganic compound with the formula UO₂F₂. It is most notable as a contaminant in the production of uranium tetrafluoride.^[2]

As shown by X-ray crystallography, the uranyl centers UO2+2 are surrounded by six fluoride ligands F⁻.^[3]

Synthesis

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^[4]

Physical properties

This salt is very soluble in water as well as hygroscopic. 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

^ https://ibilabs.com/uranium-uranyl-thorium-compounds/uranyl-compounds/uranyl-fluoride/
^ 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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[ibilabs-1] ttps://ibilabs.com/uranium-uranyl-thorium-compounds/uranyl-compounds/uranyl-fluoride/

[Ull-2] 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.

[3] 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.

[:0-4] 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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