Raman and IR studies of the effect of Fe substitution in hydroxyapatites and deuterated hydroxyapatite
| Autor: | E. Liarokapis, Theodora Leventouri, Anastasios Antonakos, Andreas Kyriacou |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Chemistry
020502 materials Substitution (logic) Infrared spectroscopy 02 engineering and technology 021001 nanoscience & nanotechnology Internal mode Ion symbols.namesake Crystallography Geophysics 0205 materials engineering Deuterium Geochemistry and Petrology symbols Hydroxyapatites Fourier transform infrared spectroscopy 0210 nano-technology Raman spectroscopy |
| Zdroj: | American Mineralogist. 102:85-91 |
| ISSN: | 0003-004X |
| DOI: | 10.2138/am-2017-5884 |
| Popis: | We have studied synthetic Fe-substituted hydroxyapatite Ca 5−x Fe x (PO 4 ) 3 OH 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 Ca 3 -(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. |
| Databáze: | OpenAIRE |
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