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Related Experiment Videos

Ca2MgWO6 from neutron and X-ray powder data.

Jae Ho Yang1, Woong Kil Choo, Chang Hee Lee

  • 1Advanced LWR Fuel Development, Korea Atomic Energy Research Institute, 105 Dukjin-dong, Yuseong-gu, 305-600, Daejeon, South Korea. yangjh@kaeri.re.kr

Acta Crystallographica. Section C, Crystal Structure Communications
|August 12, 2003
PubMed
Summary

The crystal structure of dicalcium magnesium tungstate, Ca(2)MgWO(6), was determined at room temperature. This complex perovskite exhibits B-site ordering and specific octahedral tilt patterns.

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Crystallography

Background:

  • Complex perovskites are a class of materials with diverse applications.
  • Understanding the structure of these materials is crucial for predicting their properties.
  • Dicalcium magnesium tungstate (Ca(2)MgWO(6)) is a B-site-ordered complex perovskite.

Purpose of the Study:

  • To determine the room-temperature crystal structure of Ca(2)MgWO(6).
  • To elucidate the B-site ordering and octahedral tilt mechanisms in this compound.

Main Methods:

  • Simultaneous Rietveld refinement of neutron and X-ray powder diffraction data.
  • Analysis of crystallographic structure and octahedral coordination.

Main Results:

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  • The room-temperature structure of Ca(2)MgWO(6) was successfully determined.
  • The material exhibits a high degree of B-site ordering.
  • An a(-)a(-)c(+)-type BO(6) octahedral tilt mechanism was identified.

Conclusions:

  • The determined structure provides a fundamental understanding of Ca(2)MgWO(6).
  • The B-site ordering and octahedral tilts are key features influencing the material's properties.
  • This study contributes to the knowledge of complex perovskite structures.