Diffraction Anomalous Fine Structure on Forbidden and Superlattice Reflections

T. Toda, T. Nogami, K. Yamasaki, Yuji Soejima

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Abstract

The phenomenon of diffraction anomalous fine structure (DAFS) has been examined in relation to structural symmetry and is discussed for PbZrO3 in the space group Pbam. It is found that DAFS appears on the superlattice reflection, even if the intensity of the reflection is free from the anomalous dispersion of heavy atoms at the relevant absorption edges. For reflections that are forbidden by the glide symmetry, DAFS oscillation can be observed, unaffected by the influence of absorption and of X-ray absorption fine structure oscillation; the amplitude of DAFS oscillation depends on the polarization of incident X-rays. The role of DAFS signals in superstructure investigation is discussed with respect to highly absorbing crystals of finite size.

Original languageEnglish
Pages (from-to)423-429
Number of pages7
JournalJournal of Applied Crystallography
Volume31
Issue number3
DOIs
Publication statusPublished - Jun 1 1998

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All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)

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