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Russian Journal of Inorganic Chemistry

, Volume 59, Issue 4, pp 279–285 | Cite as

Short- and long-range order balance in nanocrystalline Gd2Zr2O7 powders with a fluorite-pyrochlore structure

  • V. V. PopovEmail author
  • Ya. V. Zubavichus
  • A. P. Menushenkov
  • A. A. Yaroslavtsev
  • E. S. Kulik
  • V. F. Petrunin
  • S. A. Korovin
  • N. N. Trofimova
Synthesis and Properties of Inorganic Compounds

Abstract

A series of nanocrystalline Gd2Zr2O7 powders has been studied using a combination of X-ray diffraction and X-ray spectroscopy with synchrotron radiation. It has been shown that isothermal annealing of an X-ray amorphous mixed hydroxide first leads to the formation of an oxide nanomaterial with a defect fluorite structure and clearly pronounced nonequivalence of the local environment of the Gd3+ and Zr4+ ions. Increasing heat treatment temperature results in initiation and growth of nanodomains with pyrochlore-type superstructure ordering of cations inside bulkier crystallites of defect fluorite. To adequately describe the evolution of the real nanocrystalline structure of gadolinium zirconate, a combination of X-ray structural methods sensitive to the averaged crystal structure and local atomic structure should be used.

Keywords

Increase Annealing Temperature Coordination Shell Pair Distribution Function Pyrochlore Structure Local Atomic Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2014

Authors and Affiliations

  • V. V. Popov
    • 1
    Email author
  • Ya. V. Zubavichus
    • 2
  • A. P. Menushenkov
    • 1
  • A. A. Yaroslavtsev
    • 1
  • E. S. Kulik
    • 1
  • V. F. Petrunin
    • 1
  • S. A. Korovin
    • 1
  • N. N. Trofimova
    • 2
  1. 1.National Research Nuclear University “MEPhI”MoscowRussia
  2. 2.National Research Center Kurchatov InstituteMoscowRussia

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