Zinc incorporation into hydroxylapatite

Tang, A. and Chappell, H. F. and Dove, M. T. and Reeder, R. J. and Lee, Y. J. (2009) Zinc incorporation into hydroxylapatite. Biomaterials. ISSN 01429612 DOI 10.1016/j.biomaterials.2009.01.043

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Abstract

By theoretical modeling and X-ray absorption spectroscopy, the local coordination structure of Zn incorporated into hydroxylapatite was examined. Density function theory (DFT) calculations show that Zn favors the Ca2 site over the Ca1 site, and favors tetrahedral coordination. X-ray absorption near edge structure (XANES) spectroscopy results suggest one dominant coordination environment for the incorporated Zn, and no evidence was observed for other Zn-containing phases. Extended X-ray absorption fine structure (EXAFS) fitting of the synthetic samples confirms that Zn occurs in tetrahedral coordination, with two P shells at not, vert, similar2.85–3.07 Å, and two higher Ca shells at not, vert, similar3.71–4.02 Å. These fit results are consistent with the most favored DFT model for Zn substitution in the Ca2 site.

Item Type: Article
Uncontrolled Keywords: 08AREP; IA57;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Biomaterials
Identification Number: 10.1016/j.biomaterials.2009.01.043
Depositing User: Sarah Humbert
Date Deposited: 05 Mar 2009 08:36
Last Modified: 23 Jul 2013 09:54
URI: http://eprints.esc.cam.ac.uk/id/eprint/853

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