Acta Crystallographica Section E

Structure Reports Online

Volume 61, Part 3 (March 2005)

inorganic compounds

 

Eu_1.8La_0.2BaZnO₅: a Rietveld refinement using X-ray powder diffraction

J. A. Hernández-Pérez, M.-E. Villafuerte-Castrejón and L. Bucio

Abstract: The families of oxides with stoichiometry RE₂BaMO₅ (where RE is a trivalent rare earth, and M is Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺, Pd²⁺ or Pt²⁺) are known as the green phases in studies of Y-Ba-Cu-O superconductor ceramics. These oxides are not superconductors but nevertheless present interesting structural types. In this work, the synthesis and structural characterization using the Rietveld method applied to X-ray powder diffraction data for Eu_1.8La_0.2BaZnO₅ (europium lanthanum barium zinc oxide) are presented. The compound is isostructural with Y₂BaZnO₅. The two sites for Y³⁺ are occupied by Eu³⁺, while La³⁺ ions partially occupy one of these sites.

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