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High-resolution neutron powder diffraction study on the structure of BaPbO3

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
134
Issue
10
Identifiers
DOI: 10.1016/j.ssc.2005.03.019
Keywords
  • B. Chemical Synthesis
  • C. Crystal Structure And Symmetry
  • Neutron Diffraction

Abstract

Abstract Using high-resolution time-of-flight neutron powder diffraction, the crystal structure of BaPbO 3 has been reinvestigated at room temperature and 4.2 K. By comparing different structural models, i.e. the orthorhombic Imma and the monoclinic I2/ m, it is concluded that the former one describes correctly the structure of BaPbO 3, and no Imma→ I2/ m phase transition exists in the temperature range investigated. The apparent monoclinic distortion is likely due to the existence of twins that introduce the micro strain resulting in anisotropic line broadening of the observed profiles.

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