Twinning and structure of Eu0.6Sr0.4MnO3

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Tamazyan, Rafael ; Rotiroti, Nicola ; van Smaalen, Sander ; Mukovskii, Yakov ; Arsenov, A.:
Twinning and structure of Eu0.6Sr0.4MnO3.
In: Acta Crystallographica Section C. Bd. 62 (2006) Heft 1 . - S. 3-5.
ISSN 1600-5759
DOI: https://doi.org/10.1107/S0108270105036644

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Abstract

The crystal structure of europium strontium manganese trioxide, Eu0.6Sr0.4MnO3, has been refined using a multiply twinned single crystal containing six twin components. The MnO6 octa­hedra show Jahn-Teller distortions with nearly fourfold symmetry, but the octa­hedral tilting scheme reduces the crystal symmetry to ortho­rhom­bic (space group Pbnm). The refinement of site occupancies and the analysis of difference Fourier maps show that the Eu3+ and Sr2+ cations occupy different crystallographic positions with eightfold and twelvefold coordination, respectively.