The relationship of monodentate and bidentate coordinated uranium(VI) sulfate in aqueous solution
Creators
- 1. Forschungszentrum Rossendorf e.V. (FZR) (Germany). Inst. fuer Radiochemistry
- 2. Argonne National Lab., IL (United States). Chemistry Div.
- 3. Katholieke Univ. Leuven (Belgium). Dept. of Chemistry
Description
The coordination of U(VI) sulfate complexes has been investigated by uranium LIII-edge EXAFS and HEXS measurements with the aim to distinguish monodentate and bidentate coordinated sulfate in aqueous solution. UV-vis absorption spectroscopy has been used to differentiate the species and to determine the species distribution as a function of the [SO42-]/[UO22+] ratio. A monodentate coordination prevails in solutions with [SO42-]/[UO22+] ratio of 1, where UO2SO4 is the dominant species. Besides the dominating monodentate sulfate a small amount of bidentate sulfate could be observed, indicating that two isomers may exist for UO2SO4. With increasing [SO42-]/[UO22+] ratio the UO2(SO4)22- species becomes the main species. The uranium atom of this species is coordinated by two bidentate sulfate groups. (orig.)
Additional details
Publishing Information
- Journal Title
- Radiochimica Acta
- Journal Volume
- 96
- Journal Issue
- 9-11
- Journal Page Range
- p. 607-611
- ISSN
- 0033-8230
- CODEN
- RAACAP
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 40007932
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Descriptors DEI
- ABSORPTION SPECTRA; AQUEOUS SOLUTIONS; COORDINATION VALENCES; DISTRIBUTION FUNCTIONS; ISOMERS; PH VALUE; ULTRAVIOLET SPECTRA; URANYL SULFATES; VISIBLE SPECTRA; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY
- Descriptors DEC
- ACTINIDE COMPOUNDS; COHERENT SCATTERING; DIFFRACTION; DISPERSIONS; FUNCTIONS; HOMOGENEOUS MIXTURES; MIXTURES; OXYGEN COMPOUNDS; SCATTERING; SOLUTIONS; SPECTRA; SPECTROSCOPY; SULFATES; SULFUR COMPOUNDS; URANIUM COMPOUNDS; URANYL COMPOUNDS; VALENCE