Uranyl Ion Coordination

A review of the known crystal structures containing the uranyl ion shows that plane-pentagon coordination is equally as prevalent as plane-square or plane-hexagon. It is suggested that puckered-hexagon configurations of OH$^{-}$ or H$_{2}$O about the uranyl group will tend to revert to plane-pentago...

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Bibliographic Details
Published inScience (American Association for the Advancement of Science) Vol. 141; no. 3576; pp. 154 - 158
Main Author Evans, Howard T.
Format Journal Article
LanguageEnglish
Published United States American Association for the Advancement of Science 12.07.1963
AAAS
Subjects
Atoms
BIBLIOGRAPHY
CONFIGURATION
Coordination numbers
Crystal structure
CRYSTALS
Geometric planes
Hexagonal crystals
Hexagons
HYDROLYSIS
HYDROXIDES
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
IONS
NUCLEI
Oxygen
Pentagons
SOLUTIONS
Uranium
URANYL COMPOUNDS
WATER
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Summary:A review of the known crystal structures containing the uranyl ion shows that plane-pentagon coordination is equally as prevalent as plane-square or plane-hexagon. It is suggested that puckered-hexagon configurations of OH$^{-}$ or H$_{2}$O about the uranyl group will tend to revert to plane-pentagon coordination. The concept of pentagonal coordination is invoked for possible explanations of the complex crystallography of the natural uranyl hydroxides and the unusual behavior of polynuclear ions in hydrolyzed uranyl solutions.
Bibliography:USDOE
ISSN:0036-8075
1095-9203
DOI:10.1126/science.141.3576.154