Thorium oxyfluoride

Thorium oxyfluoride is an inorganic compound of thorium metal, fluorine, and oxygen with the chemical formula ThOF
₂.^[1][2][3]

Thorium oxyfluoride

Names
Other names thorium difluoride oxide, thorium fluoride oxide, thorium(IV) difluorideoxide
Identifiers
CAS Number	13597-30-3 Y
3D model (JSmol)	Interactive image
ChemSpider	21428670
EC Number	237-045-2
PubChem CID	25022211
CompTox Dashboard (EPA)	DTXSID1065554
InChI InChI=1S/2FH.O.Th/h2*1H;;/q;;;+2/p-2 Key: KXAYMKGDXBMOAK-UHFFFAOYSA-L
SMILES [Th](F)(F)=O
Properties
Chemical formula	ThOF 2
Molar mass	286.034 g/mol
Appearance	white powder
Solubility in water	insoluble
Related compounds
Related compounds	Lanthanum oxyfluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

• Thorium oxyfluoride can be prepared from partial hydrolysis of thorium tetrafluoride in moist air at elevated temperatures, about 1000 °C.^[4][5]

ThF₄ + H₂O → ThOF₂ + 2 HF

• Reaction of thorium tetrafluoride with thorium dioxide at 600 °C:

ThF₄ + ThO₂ → 2 ThOF₂

Physical properties

The compound forms white, insoluble amorphous powder.^[6]

Uses

The compound is used as a protective coating on reflective surfaces.^[7]

References

1. "THORIUM OXYFLUORIDE". Alfa Chemistry. Archived from the original on 21 March 2023. Retrieved 21 March 2023.
2. Yemel'Yanov, V. S.; Yevstyukhin, A. I. (22 October 2013). The Metallurgy of Nuclear Fuel: Properties and Principles of the Technology of Uranium, Thorium and Plutonium. Elsevier. p. 369. ISBN 978-1-4831-8602-3. Retrieved 21 March 2023.
3. Perry, Dale L. (19 April 2016). Handbook of Inorganic Compounds. CRC Press. p. 427. ISBN 978-1-4398-1462-8. Retrieved 21 March 2023.
4. Darnell, A. J. (1960). The Free Energy, Heat, and Entropy of Formation of Thorium Oxyfluoride. Atomics International. p. 1. Retrieved 21 March 2023.
5. Zachariasen, W. H. (1947). Fluorides of Uranium and Thorium with Lanthanum Fluoride Type of Structure. Atomic Energy Commission. p. 1153. Retrieved 21 March 2023.
6. Satya, Prakash (2013). Advanced Chemistry of Rare Elements. S. Chand Publishing. p. 436. ISBN 978-81-219-4254-6. Retrieved 21 March 2023.
7. Lewis, Robert A. (1 April 2016). Hawley's Condensed Chemical Dictionary. John Wiley & Sons. p. 1339. ISBN 978-1-119-26784-3. Retrieved 21 March 2023.