Structural investigations of lead-strontium fluoroapatites
- Laboratoire de Physico-Chimie des Materiaux, Ecole Nationale d'Ingenieurs de Monastir, 5019 Monastir (Tunisia)
- Dipartimento di Chimica 'G. Ciamician', Universita degli Studi, and Istituto per la Sintesi Organica e la Fotoreattivita, CNR, Via Selmi2, 40126 Bologna (Italy)
Solid solutions in the system Pb{sub (10-x)}Sr {sub x} (PO{sub 4}){sub 6}F{sub 2}, 0{<=}x{<=}10, were obtained as apatitic phases from aqueous medium. They were investigated by X-ray diffraction, chemical analysis and infrared (IR) spectroscopy. The results of the structural refinements indicated that the substitution of lead by strontium induces a regular decrease of the lattice constant 'a' and a preferential strontium distribution in site M(1). A progressive shift of the F{sup -} ion position along the apatitic channel was detected and confirmed by IR evidence. The different character of the M-F and M-O interactions was invoked to justify the structural differences observed as a function of composition. - Graphical abstract: The structural refinements carried out on five Pb{sub (10-x)}Sr {sub x} (PO{sub 4}){sub 6}F{sub 2} samples evidence preferential distribution of cations in metal sites and a progressive shift of the F{sup -} ion.
- OSTI ID:
- 20900849
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 10; Other Information: DOI: 10.1016/j.jssc.2006.06.001; PII: S0022-4596(06)00325-2; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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