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Cambridge University Press (CUP), Powder Diffraction, 03(21), p. 214-219

DOI: 10.1154/1.2246229

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Structural characterization of two K2SnX(PO4)3 (X=Fe,Yb) with langbeinite structure

Journal article published in 2006 by Abderrahim Aatiq, Btissame Haggouch, Rachid Bakri, Youssef Lakhdar, Ismael Saadoune ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Structures of two K2SnX(PO4)3(X=Fe,Yb) phosphates, obtained by conventional solid state reaction techniques at 950 °C, were determined at room temperature by X-ray powder diffraction using Rietveld analysis. The two materials exhibit the langbeinite-type structure (P213 space group, Z=4). Cubic unit cell parameter values are: a=9.9217(4) Å and a=10.1583(4) Å for K2SnFe(PO4)3 and K2SnYb(PO4)3, respectively. Structural refinements show that the two crystallographically independent octahedral sites (of symmetry 3) have a mixed Sn∕X (X=Fe,Yb) population although ordering is stronger in the Yb phase than in the Fe phase.