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Funct. Mater. 2018; 25 (4): 713-719.

doi:https://doi.org/10.15407/fm25.04.713

New gadolinium-substituted lead sodium apatite structure

Mohammed A. B. Abdul Jabar1, E.I.Get'man2, A.V.Ignatov2

1Department of Microbiology, College of Science, Al-Karkh University of Science, Hayfa Street, Baghdad 10001, Iraq
2Department of Inorganic Chemistry, Donetsk National University, 24 Universitets'ka, Donets'k 83001, Ukraine

Abstract: 

The substitution of gadolinium by lead in the compound Pb8-xNa2Gdx(PO4)6Ox/2, in accordance with the scheme 2Pb2+ + • ↠ 2Gd3+ + O2- was studied by means of powder X-ray diffraction (including the Rietveld refinement). It was established that solid solutions apatite samples are synthesized at 900 °C between the range from x = 0.0 up to x = 1.0. Rietveld method shows that Gd3+ is located in positions Pb(2), resulting in the distance in a polyhedron Pb(2) where the structure of apatite decreased.

Keywords: 
lead, apatite, gadolinium, substitution, solid solution.
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