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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Editor-in-Chief: Qaim, Syed M.

12 Issues per year


IMPACT FACTOR 2017: 1.202

CiteScore 2017: 1.22

SCImago Journal Rank (SJR) 2017: 0.409
Source Normalized Impact per Paper (SNIP) 2017: 0.869

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ISSN
2193-3405
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Volume 88, Issue 5

Issues

Fluoride complexation of rutherfordium (Rf, element 104)

E. Strub / Jens Volker Kratz / A. Kronenberg / A. Nähler / P. Thörle / S. Zauner / W. Brüchle / E. Jäger / M. Schädel / B. Schausten
Published Online: 2009-09-25 | DOI: https://doi.org/10.1524/ract.2000.88.5.265

The fluoride complexation of the group-4 elements Zr, Hf and Rf, and of the pseudo-homolog Th, has been investigated in mixed HNO3/HF solutions by studying Kd values on both cation exchange resins (CIX) and anion exchange resins (AIX) using the automated rapid chemistry apparatus ARCA. On the CIX, the four elements are strongly retained as cations below 10-3 M HF. For Zr and Hf, the decrease of the Kd values due to the formation of fluoride complexes occurs between 10-3 M HF and 10-2 M HF. For Rf and Th, this decrease is observed at one order of magnitude higher HF concentrations. On the AIX, for Zr and Hf, a rise of the Kd values due to the formation of anionic fluoride complexes is observed between 10-3 M HF and 10-2 M HF, i.e. in the same range of HF concentrations where the decrease of the Kd values on the CIX is observed, yielding a consistent picture. For Rf and Th, on the AIX, no rise of the Kd values is observed even if the HF concentration is increased up to 1 M. By varying the concentration of the counter ion NO3- which is competing for the binding sites on the AIX resin, it could be shown, nevertheless, that Rf does form anionic fluoride complexes. Apparently, there is a more specific competition of NO3- with respect to [RfFx](x-4)- than with [ZrFy](y-4)- and [HfFz](z-4)-.

About the article

Published Online: 2009-09-25

Published in Print: 2000-05-01


Citation Information: Radiochimica Acta, Volume 88, Issue 5, Pages 265–272, ISSN (Online) 2193-3405, ISSN (Print) 0033-8230, DOI: https://doi.org/10.1524/ract.2000.88.5.265.

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