Research output: Chapter in Book/Report/Conference proceeding › Chapter › Research › peer-review
The molecular water incorporation in bioapatites obtained by bone pyrolysis at temperatures of 600–1100 °C has been investigated using in situ solid 1H nuclear magnetic resonance (solid 1H NMR) method in the temperature range of T = 25–300 °C and, in addition, 1H magic-angle spinning NMR, X-ray diffraction and infrared spectroscopy at room temperature. For comparison, synthetic analogues of bioapatite, precipitated hydroxyapatite (HA), HA with La impurity and carbonate fluorapatite were investigated as well. It was established that there are water molecules adsorbed on crystallites surfaces and bound in structure (H2Os) in studied apatites. More rigid H2Os1 molecules cause the doublet under normal conditions and the wide singlet at T ≥ 150 °C in situ 1H solid NMR spectra. In addition, H2Os3 molecules with reorientation mobility at T = 150–300 °C are presented in bioapatite and HA annealed at lower temperatures and La-HA. Water incorporation into structure of bioapatite annealed at 600–1100 °C and its synthetic analogues HA is established to be zeolite-like. Presumably, the configuration of cavities is formed in the apatite crystal scaffold during annealing of studied apatites. These cavities are related with vacancy clusters in original structures and connected between themselves and with surface by the channels with a diameter of not more than 0.3 nm. Water molecules trapped in smaller (H2Os2) and larger cavities (H2Os1) cause the doublet and singlet, respectively; water molecules in OH vacancies in channels (H2Os3) are due to narrow lines.
Original language | English |
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Title of host publication | Processes and Phenomena on the Boundary Between Biogenic and Abiogenic Nature |
Subtitle of host publication | Conference proceedings |
Editors | Olga V. Frank-Kamenetskaya, Dmitry Yu. Vlasov, Elena G. Panova, Sofia N. Lessovaia |
Place of Publication | Cham |
Publisher | Springer Nature |
Pages | 79-105 |
Number of pages | 27 |
ISBN (Electronic) | 9783030216146 |
ISBN (Print) | 9783030216139 |
DOIs | |
State | Published - 2020 |
Event | VI International Symposium "Biogenic-abiogenic interactions in natural and anthropogenic systems", devoted to the 150th anniversary of the Saint-Petersburg Naturalists Society - СПбГУ, Saint-Petersburg, Russian Federation Duration: 24 Sep 2018 → 27 Sep 2018 Conference number: VI |
Name | Lecture Notes in Earth System Sciences |
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Publisher | SPRINGER INTERNATIONAL PUBLISHING AG |
ISSN (Print) | 2193-8571 |
Conference | VI International Symposium "Biogenic-abiogenic interactions in natural and anthropogenic systems", devoted to the 150th anniversary of the Saint-Petersburg Naturalists Society |
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Country/Territory | Russian Federation |
City | Saint-Petersburg |
Period | 24/09/18 → 27/09/18 |
ID: 46330833