Synthesis and Structural Characterization of Ba(LnIII2/3BVI1/3)O3 (LnIII = Dy, Gd and Sm; BVI = Mo or W) Complex Perovskites

A.F. Fuentes; M. Garza-García; J.I. Escalante-García; G. Mendoza-Suarez; K. Boulahya; U. Amador. Synthesis and Structural Characterization of Ba(LnIII2/3BVI1/3)O3 (LnIII = Dy, Gd and Sm; BVI = Mo or W) Complex Perovskites. Journal of Solid State Chemistry (ISSN: 0022-4596). 2003, Vol. 175, p. 299-2003.

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(Dy2/3Mo1/3)O3, Ba(Dy2/3W1/3)O3, Ba(Gd2/3Mo1/3)O3, Ba(Gd2/3W1/3)O3 and Ba(Sm2/3W1/3)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).