Wikipedia

Uranyl iodide

Uranyl iodide
Names
Other names
  • Uranium(VI) iodide oxide
  • Uranium diiodide dioxide
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/2HI.2O.U/h2*1H;;;/q;;;;+2/p-2
    Key: REGOIDKCYACLEE-UHFFFAOYSA-L
  • O=[U](I)(I)=O
Properties
UO2I2
Molar mass 523.836 g·mol−1
Appearance red crystals[1]
Related compounds
Other anions
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Uranyl iodide is an compound of uranium, oxygen, and iodine with the chemical formula UO2I2.[2][3]

Synthesis

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Uranyl iodide can be obtained by treating UO2(OTf)2 with pure Me3SiI.[4]

Also, uranyl iodide can be prepared by reduction of uranyl iodate with aqueous sulphur dioxide (Richards and Merigold, 1902) and by double decomposition of uranyl sulphate and barium or calcium iodide (Truttwinn, 1925; Lynds, 1962).[5]

Also, the compound can be prepared by adding barium iodide in excess to an ethereal solution of uranyl nitrate.[1]

Chemical properties

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The compound reacts with water and oxygen to produce uranyl hydroxide:[6]

UO2I2 + H2O + 1/2O2 → UO2(OH)2 + I2

References

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  1. ^ a b Vallance, Reece H.; Eldridge, Arthur A. (1926). Chromium and Its Congeners. Griffin. p. 299. Retrieved 4 October 2025.
  2. ^ Cotton, S. A. (15 December 2005). "16 Scandium, yttrium, the lanthanides and the actinides". Annual Reports Section 'A' (Inorganic Chemistry). 101: 294–318. doi:10.1039/B410468B. ISSN 1460-4760. Retrieved 4 October 2025.
  3. ^ Prins, G; Cordfunke, E. H. P; Ouweltjes, W (1 October 1978). "Standard enthalpies of formation of uranium compounds V. UO2Br2, UO2Br2·H2O, UO2Br2·3H2O, and UO2(OH)Br·2H2O A comment on the stability of uranyl iodide and its hydrates". The Journal of Chemical Thermodynamics. 10 (10): 1003–1010. doi:10.1016/0021-9614(78)90062-9. ISSN 0021-9614. Retrieved 4 October 2025.
  4. ^ Berthet, Jean-Claude; Nierlich, Martine; Ephritikhine, Michel (24 March 2004). "Synthesis of the stable UO2I2, the last of the uranyl dihalides. X-Ray crystal structure of [UO2I2(py)3]". Chemical Communications (7): 870–871. doi:10.1039/B400717D. ISSN 1364-548X. Retrieved 4 October 2025.
  5. ^ Gutmann, Viktor (2 December 2012). Halogen Chemistry. Elsevier. p. 367. ISBN 978-0-323-14847-4. Retrieved 4 October 2025.
  6. ^ Rabinowitch, Eugene (1954). Photochemistry of Uranyl Compounds. U.S. Atomic Energy Commission. p. 17. Retrieved 4 October 2025.