Structural Relationships in Oxygen-Containing U(VI) Compounds
SpectralStructural Relationships
in Oxygen-Containing U(VI) Compounds
V. V. Syt’ko and E. N. Kabaeva
Frantsisk Skorina State University, ul. Sovetskaya 104, Gomel, 246699 Belarus
Received May 29, 2002
Abstract—Basic spectral–structural relationships in oxygen-containing U(VI) compounds have been studied.
Badger’s formulas poorly describe relationships between stretching vibration frequencies 
as and average ura-
nium–oxygen distances in oxygen-containing U(VI) compounds as a class of compounds. Major causes for this
inconsistency are considered. The modifications of Badger’s formulas of the form R0 = a + b
/CN(U) are
derived, in which a and b parameters are different for uranyl and uranate compounds and for groups of com-
pounds with various coordination numbers of uranium. For uranate-type compounds, a = 0.101 nm and b =
43.11 nm cm–2/3. For tetra-, penta-, and hexacoordinated uranyl compounds, a is –0.915, –0.419, and 
0.325nm and b is 615.7, 293.6, and 739.6 nm cm–2/3, respectively.
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