Uranium Hexoxide
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Uranium Hexoxide
Uranium hexoxide
3D model (JSmol)
  • InChI=1S/6O.U
  • O=[U](=O)(=O)(=O)(=O)=O
Molar mass 334.0288 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Uranium hexoxide is an unusual, theoretically possible compound of uranium in which the uranium atom would be attached to six oxygen atoms.[1][2] It would be an unprecedented example of an element in the +12 oxidation state; for comparison, the highest known oxidation state is +9 for iridium in the cation .[3]


Uranium hexoxide is predicted to have octahedral symmetry; however, other forms have been studied. In the 1Oh the oxygen atoms are oxide ions (O2-). In the 1D3 form there are three peroxide ions . The 3D2h form has two oxo oxygens and two pairs of superoxide .[2]


  1. ^ Pyykkö, P.; Runeberg, N.; Straka, M.; Dyall, K. G. (2000). "Could uranium(XII)hexoxide, UO6 (Oh) exist?" (PDF). Chemical Physics Letters. 328 (4-6): 415-419. Bibcode:2000CPL...328..415P. doi:10.1016/S0009-2614(00)00958-1.
  2. ^ a b Xiao, H.; Hu, H. S.; Schwarz, W. H. E.; Li, J. (2010). "Theoretical Investigations of Geometry, Electronic Structure and Stability of UO6: Octahedral Uranium Hexoxide and Its Isomers". The Journal of Physical Chemistry A. 114 (33): 8837-8844. doi:10.1021/jp102107n. PMID 20572656.
  3. ^ Wang, Guanjun; Zhou, Mingfei; Goettel, James T.; Schrobilgen, Gary J.; Su, Jing; Li, Jun; Schlöder, Tobias; Riedel, Sebastian (23 October 2014). "Identification of an iridium-containing compound with a formal oxidation state of IX". Nature. 514 (7523): 475-477. Bibcode:2014Natur.514..475W. doi:10.1038/nature13795. PMID 25341786. S2CID 4463905.

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