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Title: Synthesis and distribution of cations in substituted lead phosphate lacunar apatites

Abstract

Synthesis of apatites, Pb{sub 7.4}Bi{sub 0.3}Na{sub 2.3}(PO{sub 4}){sub 6} (I), Pb{sub 7.36}Bi{sub 0.32}Na{sub 2.08}Li{sub 0.24}(PO{sub 4}){sub 6} (II) and Pb{sub 5.78}Bi{sub 0.81}Ca{sub 0.60}Na{sub 2.81}(PO{sub 4}){sub 6} (III), with anion vacancy were carried out during solid state reactions. The three compounds of apatite-type structure crystallize in the hexagonal system, space group P6{sub 3}/m. In every compound, a preferential occupation of the (6h) site by Pb and Bi cations is shown revealing the influence of their lone electronic pair. The introduction of calcium increases the quantity of bismuth in these apatites. Alkaline metals occupy mainly the (4f) site. Infrared spectroscopy is correlated to the bonding scheme. A connection between the cations occupying (4f) sites and the c cell parameters is presented.

Authors:
 [1];  [2];  [2];  [1];  [3];  [1]
  1. Laboratoire de Sciences des Materiaux et d'Environnement, Faculte des Sciences de SFAX, BP 802, 3018 SFAX (Tunisia)
  2. (France)
  3. Centre d'Elaboration de Materiaux et d'Etudes Structurales, 29 rue J. Marvig, BP 4347, 31055 Toulouse Cedex 4 (France) and Universite Paul SABATIER, 118 Route de Narbonne, 31400 Toulouse (France). E-mail: savariau@cemes.fr
Publication Date:
OSTI Identifier:
21000591
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 42; Journal Issue: 2; Other Information: DOI: 10.1016/j.materresbull.2006.05.027; PII: S0025-5408(06)00236-4; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; APATITES; BISMUTH; CALCIUM; CATIONS; CHEMICAL PREPARATION; DEFECTS; HEXAGONAL LATTICES; INFRARED SPECTRA; INORGANIC COMPOUNDS; LEAD PHOSPHATES; SPACE GROUPS; VACANCIES; X-RAY DIFFRACTION

Citation Formats

Hamdi, Besma, Centre d'Elaboration de Materiaux et d'Etudes Structurales, 29 rue J. Marvig, BP 4347, 31055 Toulouse Cedex 4, Universite Paul SABATIER, 118 Route de Narbonne, 31400 Toulouse, Feki, Hafed El, Savariault, Jean-Michel, and Salah, Abdelhamid Ben. Synthesis and distribution of cations in substituted lead phosphate lacunar apatites. United States: N. p., 2007. Web. doi:10.1016/j.materresbull.2006.05.027.
Hamdi, Besma, Centre d'Elaboration de Materiaux et d'Etudes Structurales, 29 rue J. Marvig, BP 4347, 31055 Toulouse Cedex 4, Universite Paul SABATIER, 118 Route de Narbonne, 31400 Toulouse, Feki, Hafed El, Savariault, Jean-Michel, & Salah, Abdelhamid Ben. Synthesis and distribution of cations in substituted lead phosphate lacunar apatites. United States. doi:10.1016/j.materresbull.2006.05.027.
Hamdi, Besma, Centre d'Elaboration de Materiaux et d'Etudes Structurales, 29 rue J. Marvig, BP 4347, 31055 Toulouse Cedex 4, Universite Paul SABATIER, 118 Route de Narbonne, 31400 Toulouse, Feki, Hafed El, Savariault, Jean-Michel, and Salah, Abdelhamid Ben. Thu . "Synthesis and distribution of cations in substituted lead phosphate lacunar apatites". United States. doi:10.1016/j.materresbull.2006.05.027.
@article{osti_21000591,
title = {Synthesis and distribution of cations in substituted lead phosphate lacunar apatites},
author = {Hamdi, Besma and Centre d'Elaboration de Materiaux et d'Etudes Structurales, 29 rue J. Marvig, BP 4347, 31055 Toulouse Cedex 4 and Universite Paul SABATIER, 118 Route de Narbonne, 31400 Toulouse and Feki, Hafed El and Savariault, Jean-Michel and Salah, Abdelhamid Ben},
abstractNote = {Synthesis of apatites, Pb{sub 7.4}Bi{sub 0.3}Na{sub 2.3}(PO{sub 4}){sub 6} (I), Pb{sub 7.36}Bi{sub 0.32}Na{sub 2.08}Li{sub 0.24}(PO{sub 4}){sub 6} (II) and Pb{sub 5.78}Bi{sub 0.81}Ca{sub 0.60}Na{sub 2.81}(PO{sub 4}){sub 6} (III), with anion vacancy were carried out during solid state reactions. The three compounds of apatite-type structure crystallize in the hexagonal system, space group P6{sub 3}/m. In every compound, a preferential occupation of the (6h) site by Pb and Bi cations is shown revealing the influence of their lone electronic pair. The introduction of calcium increases the quantity of bismuth in these apatites. Alkaline metals occupy mainly the (4f) site. Infrared spectroscopy is correlated to the bonding scheme. A connection between the cations occupying (4f) sites and the c cell parameters is presented.},
doi = {10.1016/j.materresbull.2006.05.027},
journal = {Materials Research Bulletin},
number = 2,
volume = 42,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}