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
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.

Synthesis

Uranyl iodide can be obtained by treating UO2(OTf)2 with pure Me3SiI,reducing uranyl iodate with aqueous sulfur dioxide, the decomposition of uranyl sulfate with barium or calcium iodide, or adding barium iodide in excess to an ether solution of uranyl nitrate.

Chemical properties

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

UO2I2 + H2O + 1/2O2 → UO2(OH)2 + I2

References

  1. 1 2 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.
  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.
  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.
  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.