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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Editor-in-Chief: Qaim, Syed M.


IMPACT FACTOR 2017: 1.202

CiteScore 2018: 1.20

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

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2193-3405
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Volume 101, Issue 4

Issues

The incorporation of europium into apatite: anew explanation

Kiel S. Holliday / Kathy Dardenne
  • Karlsruhe Institut für Technologie, Institut für Nukleare Entsorgung, Karlsruhe, Deutschland
  • Other articles by this author:
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/ Clemens Walther
  • Forschungszentrum Karlsruhe, Institut für Nukleare Entsorgung, Eggenstein-Leopoldshafen, Deutschland
  • Other articles by this author:
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/ Th. Stumpf
  • Karlsruher Institut für Technologie, Institut für Nukleare Entsorgung, Karlsruhe, Deutschland
  • Other articles by this author:
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Published Online: 2013-03-19 | DOI: https://doi.org/10.1524/ract.2013.2023

Abstract

Time resolved laser fluorescence spectroscopy (TRLFS) and X-ray absorption fine structure (XAFS) are used as complimentary techniques to show that the hetero-valent incorporation of europium into apatite at temperatures relevant to environmental and biological processes occurs at grain boundaries and not the crystallographic calcium sites as previously presumed. For this study, we focus on mechanisms at the solid solution interface and therefore define this temperature regime as the range in which liquid water exists (0–100 ºC). Site-selective TRLFS show that the local Eu3+ symmetry does not match the presumed crystallographic site of incorporation. This is confirmed by XAFS results that show a deviation from the local environment in apatite. The transition of this amorphous europium to acrystallographic calcium site upon heating is then explained by grain growth and followed through a transition species by TRLFS.

Keywords: Apatite; Europium; TRLFS; EXAFS; Incorporation

About the article

* Correspondence address: Lawrence Livermore National Lab, Materials Division, 7000 East Avenue, Livermore CA, U.S.A.,


Published Online: 2013-03-19

Published in Print: 2013-04-01


Citation Information: Radiochimica Acta International journal for chemical aspects of nuclear science and technology, Volume 101, Issue 4, Pages 267–272, ISSN (Print) 2193-3405 , DOI: https://doi.org/10.1524/ract.2013.2023.

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