Neutron powder diffraction study of Pb2Sr2YCu3O8, the prototype of a new family of superconductors

R. J. Cava, M. Marezio, J. J. Krajewski, W. F. Peck, A. Santoro, F. Beech

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The structure of Pb2Sr2YCu3O8 has been analyzed with powder neutron diffraction techniques and profile analysis. The results of this study confirm the general structural features determined by X-ray single-crystal methods. The material has pseudo tetragonal symmetry, but is orthorhombic, space group Cmmm with lattice parameters a=5.3933(2), b=5.4311(2), and c=15.7334(6)Å. The orthorhombic distortion is caused by the disordering in the ab plane of the oxygen atoms of the PbO layers over the general position of the space group, with x=0.275(5) and y=0.402(5) Å. The structure of this compound can be derived from that of YBa2Cu3O6 by substituting the Cu layers with blocks of ... PbO.Cu.PbO... . Of the two Cu atoms in the asymmetric unit, one has two fold coordination while the other has five fold pyramidal coordination with the apex elongated along the c-axis.

Original languageEnglish (US)
Pages (from-to)272-278
Number of pages7
JournalPhysica C: Superconductivity and its applications
Issue number2
StatePublished - Feb 1 1989
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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