Synthesis and structural characterization of Ba(Ln2/3B1/3)O3 (Ln=Dy, Gd and Sm; B=Mo or W) complex perovskites期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Synthesis and structural characterization of Ba(Ln_2/3B_1/3)O₃ (Ln=Dy, Gd and Sm; B=Mo or W) complex perovskites

Authors:	Antonio F Fuentes M Garza-Garc?&#x;a G Mendoza-Suárez U Amador

Institution:	^a CINVESTAV-IPN Unidad Saltillo, Apartado Postal 663, 25000 Saltillo, Coahuila, Mexico ^b Departamento de Qu?́mica Inorgánica, Facultad de Ciencias Qu?́micas, Universidad Complutense, 28040 Madrid, Spain ^c Departamento de CC. Qu?́micas, Facultad de Ciencias Experimentales y de la Salud, Universidad San Pablo-CEU, Urbanización Montepr?́ncipe, 28668 Boadilla del Monte, Madrid, Spain

Abstract:	We describe in this work the synthesis and crystal structure of five rare earth and Mo(VI) or W(VI) containing complex perovskites. The compounds studied are Ba(Dy_2/3Mo_1/3)O₃, Ba(Dy_2/3W_1/3)O₃, Ba(Gd_2/3Mo_1/3)O₃, Ba(Gd_2/3W_1/3)O₃ and Ba(Sm_2/3W_1/3)O₃ and were prepared starting from solutions, by the polymeric precursors method. Structural characterization by HREM, SAED and powder XRD revealed the five compounds to be ordered cubic perovskites, SG Fm-3m (225), with a cell parameter double of that of a simple perovskite cell and increasing as the size of the trivalent lanthanide ion increases (Dy<Gd<Sm).

Keywords:	Complex perovskites Tungsten Molybdenum Lanthanides SAED HREM XRD
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