Crystal structure of the Sr6Nb4ZrO18 slab perovskite-like compound

Yuri Alexandrovich Titov; Nadezhda Belyavina; Mykola Slobodyanik; Vitaly Polubinskii; Olesya Nakonechna

doi:10.17721/fujcV3I2P65-71

Authors

Yuri Alexandrovich Titov Taras Shevchenko National university of Kyiv
Nadezhda Belyavina Taras Shevchenko national university of Kyiv
Mykola Slobodyanik Taras Shevchenko national university of Kyiv
Vitaly Polubinskii Taras Shevchenko national university of Kyiv
Olesya Nakonechna Taras Shevchenko national university of Kyiv

DOI:

https://doi.org/10.17721/fujcV3I2P65-71

Keywords:

oxides, heat treatment, Rietveld analysis, crystal structure, dielectric properties

Abstract

The Sr₆Nb₄ZrO₁₈ niobatozirconate has been synthesized from the Sr₅Nb₄O₁₅ four-layer perovskite and the SrZrO₃ perovskite at T = 1670 K by ceramic technique. Crystal structure of the Sr₆Nb₄ZrO₁₈ compound has been studied by the X-ray powder diffraction method. It was shown that crystal structure of the Sr₆Nb₄ZrO₁₈ (a = 0.5687(1) nm, c = 4.146(1) nm, R-3m space group) belongs to the Ba₆Nb₄TiO₁₈-type with five-layer perovskite-like structure. The crystal structure features of the Sr₆Nb₄B^IVO₁₈ compounds (B^IV = Ti, Sn, Zr) has been analyzed. The correlation between composition and crystal structure features for all Sr₆Nb₄B^IVO₁₈ (B^IV = Ti, Sn, Zr) compounds, which leads to destruction slab perovskite-like structure has been revealed.

Author Biography

Nadezhda Belyavina, Taras Shevchenko national university of Kyiv

Department of Physics

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