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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Editor-in-Chief: Qaim, Syed M.

IMPACT FACTOR 2018: 1.339

CiteScore 2018: 1.20

SCImago Journal Rank (SJR) 2018: 0.333
Source Normalized Impact per Paper (SNIP) 2018: 0.720

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Volume 96, Issue 9-11


The relationship of monodentate and bidentate coordinated uranium(VI) sulfate in aqueous solution

Christoph Hennig / A. Ikeda / K. Schmeide / Vinzenz Brendler / Henry Moll / S. Tsushima / A. C. Scheinost / Suntharalingam Skanthakumar / R. Wilson / L. Soderholm
  • 9 Argonne National Laboratory, Chemical Sciences and Engineering Division, Argonne, Illinois, U.S.A.
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/ K. Servaes / et al.
Published Online: 2009-09-25 | DOI: https://doi.org/10.1524/ract.2008.1543


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.

Keywords: EXAFS; HEXS; UV-vis; Uranyl sulfate; Aqueous solution

About the article

* Correspondence address: Forschungszentrum Dresden-Rossendorf, Institut für Radiochemie, 01314 Dresden,

Published Online: 2009-09-25

Published in Print: 2008-11-01

Citation Information: Radiochimica Acta International journal for chemical aspects of nuclear science and technology, Volume 96, Issue 9-11, Pages 607–611, ISSN (Print) 0033-8230, DOI: https://doi.org/10.1524/ract.2008.1543.

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