Synthesis and crystal structure of layer scandotitanates Sr2LnScTiO7

Authors

  • Y.A. Titov
  • N.M. Belyavina
  • V.Ya. Markiv
  • M. S. Slobodyanik
  • V.V. Polubinskii

DOI:

https://doi.org/10.15407/dopovidi2015.02.130

Keywords:

crystal structure, layer scandotitanates, synthesis

Abstract

The boundary of a region with layered perovskite-like structure (LPS) in the rows of Sr2LnScTiO7-type compounds is determined. The new scandotitanates Sr2LnScTiO7 (Ln=La, Pr, Nd, Sm) have been synthesized by the solid-phase sintering from equimolar mixtures Sr2TO4+LnScO3 or SrLn2Sc2O7+Sr3Ti2O7, and their crystal LPSs are determined by the Rietveld method. It is found that the LPS of Sr2LnScTiO7 belong to the SrLn2Sc2O7-type structure (sp. gr. Fmmm). The final RB values are equal to 0.073–0.079. The peculiarities of the LPS of Sr2LnInTiO7 are analyzed and shown that the "adding" of the second layer of octahedrons in perovskite-like blocks of Sr2TiO4 by perovskites LnBIIIO3 destabilizes the LPS.

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References

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Published

08.01.2025

How to Cite

Titov, Y., Belyavina, N., Markiv, V., Slobodyanik, M. S., & Polubinskii, V. (2025). Synthesis and crystal structure of layer scandotitanates Sr2LnScTiO7 . Reports of the National Academy of Sciences of Ukraine, (2), 130–136. https://doi.org/10.15407/dopovidi2015.02.130

Issue

No. 2 (2015): Reports of the National Academy of Sciences of Ukraine

Section

Chemistry

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