Pb2.85Ba2.15Fe4SnO13: A new member of the AnBnO3n-2 anion-deficient perovskite-based homologous series

Oleg E. Korneychik, Maria Batuk, Artem M. Abakumov, Joke Hadermann, Marina G. Rozova, Denis V. Sheptyakov, Konstantin V. Pokholok, Dmitry S. Filimonov, Evgeny V. Antipov

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9 Citations (Scopus)

Abstract

Pb2.85Ba2.15Fe4SnO13, a new n=5 member of the anion-deficient perovskite based AnBnO 3n-2 (A=Pb, Ba, B=Fe, Sn) homologous series, was synthesized by the solid state method. The crystal structure of Pb2.85Ba 2.15Fe4SnO13 was investigated using a combination of neutron powder diffraction, electron diffraction, high angle annular dark field scanning transmission electron microscopy and Mössbauer spectroscopy. It crystallizes in the Ammm space group with unit cell parameters a=5.7990(1) Å, b=4.04293(7) Å and c=26.9561(5) Å. The Pb 2.85Ba2.15Fe4SnO13 structure consists of quasi two-dimensional perovskite blocks separated by 1/2[110](101)p crystallographic shear (CS) planes. The corner-sharing FeO6 octahedra at the CS planes are transformed into edge-sharing FeO5 distorted tetragonal pyramids. The octahedral positions in the perovskite blocks between the CS planes are jointly taken up by Fe and Sn, with a preference of Sn towards the position at the center of the perovskite block. The chains of FeO5 pyramids and (Fe,Sn)O6 octahedra of the perovskite blocks delimit six-sided tunnels at the CS planes occupied by double chains of Pb atoms. The compound is antiferromagnetically ordered below T N=368±15 K.

Original languageEnglish
Pages (from-to)3150-3157
Number of pages8
JournalJournal of Solid State Chemistry
Volume184
Issue number12
DOIs
Publication statusPublished - Dec 2011
Externally publishedYes

Keywords

  • Lone pair
  • Mössbauer spectroscopy
  • Neutron powder diffraction
  • Perovskite

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