Pb{sub 2.85}Ba{sub 2.15}Fe{sub 4}SnO{sub 13}: A new member of the A{sub n}B{sub n}O{sub 3n-2} anion-deficient perovskite-based homologous series

Journal Article · Thu Dec 15 00:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.09.029· OSTI ID:21612808

Korneychik, Oleg E ^[1]; Batuk, Maria ^[2]; Abakumov, Artem M; Hadermann, Joke ^[2]; Rozova, Marina G ^[1]; Sheptyakov, Denis V ^[3]; Pokholok, Konstantin V; Filimonov, Dmitry S; Antipov, Evgeny V ^[1]

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1. Department of Chemistry, Moscow State University, 119992 Moscow (Russian Federation)
2. Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp (Belgium)
3. Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen (Switzerland)

Pb{sub 2.85}Ba{sub 2.15}Fe{sub 4}SnO{sub 13}, a new n=5 member of the anion-deficient perovskite based A{sub n}B{sub n}O{sub 3n-2} (A=Pb, Ba, B=Fe, Sn) homologous series, was synthesized by the solid state method. The crystal structure of Pb{sub 2.85}Ba{sub 2.15}Fe{sub 4}SnO{sub 13} was investigated using a combination of neutron powder diffraction, electron diffraction, high angle annular dark field scanning transmission electron microscopy and Moessbauer spectroscopy. It crystallizes in the Ammm space group with unit cell parameters a=5.7990(1) A, b=4.04293(7) A and c=26.9561(5) A. The Pb{sub 2.85}Ba{sub 2.15}Fe{sub 4}SnO{sub 13} structure consists of quasi two-dimensional perovskite blocks separated by 1/2[110](1-bar 01){sub p} crystallographic shear (CS) planes. The corner-sharing FeO{sub 6} octahedra at the CS planes are transformed into edge-sharing FeO{sub 5} 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 FeO{sub 5} pyramids and (Fe,Sn)O{sub 6} 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{sub N}=368{+-}15 K. Highlights: Black-Right-Pointing-Pointer Compound Pb{sub 2.85}Ba{sub 2.15}Fe{sub 4}SnO{sub 13} was synthesized and characterized for the first time. Black-Right-Pointing-Pointer It is a new member of the anion-deficient perovskite based homologous series A{sub n}B{sub n}O{sub 3n-2} with n=5. Black-Right-Pointing-Pointer Its structure consists of quasi two-dimensional perovskite blocks separated by interfaces. Black-Right-Pointing-Pointer Interfaces are made up of edge-sharing FeO{sub 5} distorted tetragonal pyramids. Black-Right-Pointing-Pointer Pb{sub 2.85}Ba{sub 2.15}Fe{sub 4}SnO{sub 13} is antiferromagnetically ordered below T{sub N}=368{+-}15 K.

• OSTI ID: 21612808
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 12; Other Information: DOI: 10.1016/j.jssc.2011.09.029; PII: S0022-4596(11)00522-6; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

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37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANIONS
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
ELECTRON DIFFRACTION
INTERFACES
MOESSBAUER EFFECT
NEUTRON DIFFRACTION
PEROVSKITE
SOLIDS
SPACE GROUPS
TRANSMISSION ELECTRON MICROSCOPY
CHARGED PARTICLES
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
IONS
MICROSCOPY
MINERALS
OXIDE MINERALS
PEROVSKITES
SCATTERING
SYMMETRY GROUPS