Synthesis and Crystal Structure of Sr₂ScBiO₆

Authors: Kazin P.E.¹; Abakumov A.M.¹; Zaytsev D.D.¹; Tretyakov Y.D.¹; Khasanova N.R.²; Van Tendeloo G.²; Jansen M.³

Source: Journal of Solid State Chemistry, Volume 162, Number 1, November 2001 , pp. 142-147(6)

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Abstract:

A new complex oxide Sr₂ScBiO₆ was synthesized by a solid state reaction in air. The compound is stable up to 1150°C and acquires the desired oxygen stoichiometry at 850°C. The crystal structure was determined using powder X-ray diffraction, electron diffraction, and high-resolution electron microscopy. Sr₂ScBiO₆ has a perovskite-derived pseudocubic face-centered unit cell (a=8.1816(3) Å) and a rock-salt ordering of Sc³⁺ and Bi⁵⁺ over the B positions. Electron microscopy investigation reveals that the real structure is of the La₂NiRuO₆ type, monoclinic with cell parameters ab=a_per radic 25.785 Å, c=2a_per8.182 Å, and P2₁/n space group. The structure can be described by an a⁺b^-b^- system of the BO₆ octahedral tilting. The presence of numerous twin domains is a characteristic feature of this compound. Copyright 2001 Elsevier Science.

Language: English

Document Type: Research article

Affiliations: 1: Department of Chemistry, Moscow State University, Moscow, 119899, Russia 2: EMAT, University of Antwerp (RUCA), Groenenborgerlaan 171, Antwerp, B-2020, Belgium 3: Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, Stuttgart, D-70569, Germany

Publication date: 2001-11-01