Investigation of the isomorphic substitution of P-V in the structure of calcium hydroxyapatite by X-ray and spectral methods
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Abstract
The paper considers the possibility of forming a continuous series of solid solutions in the binary system Ca10(PO4)6(OH)2 - Ca10(VO4)6(OH)2, the extreme members of which belong to the structural type of apatite. The objects of the study were obtained by solid-phase reaction, the monophasicity of the products was confirmed by powder X-ray and IR spectroscopy. The detected anomalous deviations of the dependence of unit cell parameters on linearity (Vegard's rule) confirm the hypothesis of a possible ordering of phosphorus and vanadium atoms in solid solutions. The constancy of the volumetric coefficient of thermal expansion of the composition Ca10(PO4)3(VO4)3(OH)2 has been established with a change in temperature.
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This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution license 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
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Ministry of Science and Higher Education of the Russian Federation
Grant numbers FSWR-2024-0002
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