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American Mineralogist

Journal of Earth and Planetary Materials

Ed. by Baker, Don / Xu, Hongwu / Swainson, Ian

IMPACT FACTOR 2017: 2.645

CiteScore 2018: 2.55

SCImago Journal Rank (SJR) 2018: 1.355
Source Normalized Impact per Paper (SNIP) 2018: 1.103

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Volume 102, Issue 1


Raman and IR studies of the effect of Fe substitution in hydroxyapatites and deuterated hydroxyapatite

Anastasios Antonakos / Efthymios Liarokapis / Andreas Kyriacou
  • Physics Department, Florida Atlantic University, Boca Raton, Florida 33431, United States of America
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Theodora Leventouri
  • Physics Department, Florida Atlantic University, Boca Raton, Florida 33431, United States of America
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2017-01-03 | DOI: https://doi.org/10.2138/am-2017-5884


We have studied synthetic Fe-substituted hydroxyapatite Ca5-xFex(PO4)3OH and the corresponding deuterated samples with varying Fe concentrations x (0 ≤ x ≤ 0.3) by Raman and IR spectroscopy at room temperature. In the IR spectra, substitution of deuterons for protons affects the OH internal mode in a way consistent with the mass difference of the substituting ions, as well as a mode attributed to vibrations of the Ca3-(OH) unit. In the Raman spectra, the frequency of all modes is not noticeably affected by the Fe substitution. Raman bands show increased width and substantial reduction in intensity with increasing amount of Fe, presumably related to disorder introduced by the substitution. We find that the disorder is smaller in the hydroxyapatites compared to the deuterated ones.

Keywords: Hydroxyapatites; Fe-substitution; Raman spectroscopy; FTIR

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About the article

Received: 2016-06-17

Accepted: 2016-08-29

Published Online: 2017-01-03

Published in Print: 2017-01-01

Citation Information: American Mineralogist, Volume 102, Issue 1, Pages 85–91, ISSN (Online) 1945-3027, ISSN (Print) 0003-004X, DOI: https://doi.org/10.2138/am-2017-5884.

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© 2017 by Walter de Gruyter Berlin/Boston.

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