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Synthesis and characterization of strontium-lanthanum apatites |
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| Authors: | K. Boughzala A. Ben Chrifa K. Bouzouita |
| Affiliation: | a U.R. Matériaux Inorganiques, Département de Chimie, Faculté des Sciences, 5000 Monastir, Tunisia b Laboratoire de Thermodynamique Appliquée, Département de Chimie, Faculté des Sciences de Tunis, Campus Universitaire, 1060 Tunis, Tunisia c Institut de Chimie de la Matière Condensée, Université de Bordeaux, CNRS [UPR9048] 87 Avenue du Dr Schweitzer, 33608 Pessac Cedex, France |
| Abstract: | Two series of strontium-lanthanum apatites, Sr10−xLax(PO4)6−x(SiO4)xF2 and Sr10−xLax(PO4)6−x(SiO4)xO with 0 ≤ x ≤ 6, were synthesized by solid state reaction in the temperature range of 1200-1400 °C. The obtained materials were characterized by powder X-ray diffraction, infrared absorption spectroscopy and solid 31P Nuclear Magnetic Resonance. Pure solid solutions were obtained within a limited range of unsubstituted phosphate and silicate apatites. A variation of the lattice parameters was observed, with an increase of a and a decrease of c parameters, related to the radius of the corresponding substituted ions. |
| Keywords: | A. Inorganic compounds C. X-ray diffraction Nuclear Magnetic Resonance (NMR) |
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