Uranyl fluoride

Uranyl fluoride
Names

IUPAC name Uranium fluoride oxide
Other names Uranium oxyfluoride
Identifiers
CAS Number	13536-84-0^Y
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	308.02 g/mol
Melting point	Decomposes @ 300 °C
Boiling point	Sublimes
Solubility in other solvents	VS
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H330, H373, H411
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) 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.^[1]

As shown by X-ray crystallography, the uranyl (UO₂²⁺) centers are complemented by six fluoride ligands.^[2]

This salt is very soluble in water as well as hygroscopic. 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^[3]

References

^ 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.

Uranium compounds

U(II)

UB₂
US

U(III)

Organouranium(III) compounds	U(C₅H₅)₃

U(IV)

Organouranium(IV) compounds	U(C₈H₈)₂ U(C₅H₅)₄ U(C₅H₅)₃Cl

U(IV,V)

U₂N₃

U(IV,VI)

U₃O₈

U(V)

U(VI)

U(XII)

UO₆ (hypothetical)

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