BOUKHRIS, Amal; GLORIEUX, Benoit; BEN AMARA, Mongi

doi:10.1016/j.molstruc.2014.11.063

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BOUKHRIS, Amal
Matériaux Inorganiques

GLORIEUX, Benoit
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

BEN AMARA, Mongi
Matériaux Inorganiques

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Journal of Molecular Structure. 2015, vol. 1083, p. 319-329

Elsevier

Résumé en anglais

Different samples of a solid solution of glaserite-type structure with the general formula Na2Ba1−xSrxMg(PO4)2(0 ⩽ x ⩽ 1) were synthesized by the Pechini method and characterized by X-ray powder diffraction (XRD), 31P NMR spectroscopy and photoluminescence of europium doped compounds. The XRD patterns show that Na2Ba1−xSrxMg(PO4)2 system adopts the trigonal symmetry with the space group of PView the MathML source3¯m1 for 0 ⩽ x ⩽ 0.55 while from x = 0.6, it crystallizes in the monoclinic symmetry with the space group P21/a. The four resonances observed in the 31P NMR spectra for each composition of the system Na2Ba1−xSrxMg(PO4)2 (0 ⩽ x ⩽ 1) are interpreted on the basis of four configurations of statistical distribution (Ba2+/Sr2+) in the neighboring cationic sites of a PO4 tetrahedron. The photoluminescence of doped samples with divalent and trivalent europium was analyzed according to their compositions.< Réduire

Mots clés en anglais

Phosphate

Glaserite

31P NMR

Powder XRD

Europium

Photoluminescence

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X-ray diffraction, 31P NMR and europium photoluminescence properties of the Na2Ba1−xSrxMg(PO4)2 system related to the glaserite type structure

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