Conditions for the formation of a non-autonomous phase at the structural deformation of complex vanadium oxides

M. V. Rotermel; T. I. Krasnenko; S. A. Petrova; S. G. Titova

doi:10.15826/chimtech.2018.5.1.06

Conditions for the formation of a non-autonomous phase at the structural deformation of complex vanadium oxides

M. V. Rotermel, T. I. Krasnenko, S. A. Petrova, S. G. Titova

Abstract

A new previously unknown effect of a reversible transition from a single-phase system to a heterophase system containing a non-autonomous phase was observed during thermal and chemical deformations of the Zn_2-2xCd_2xV₂O₇ structure.The role of local symmetry in the formation of the non-autonomous phase is shown on the basis of X-ray diffraction studies in situ and a comparative crystal-chemical analysis of the structural deformations of isoform monoclinic solid solutions of zinc and copper pyrovanadates with zero volumetric thermal expansion.

Keywords

non-autonomous phase; volume thermal expansion; M2V2O7

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DOI: https://doi.org/10.15826/chimtech.2018.5.1.06

Copyright (c) 2017 Maria Rotermel, Tatjana Krasnenko, Sofia Petrova, Svetlana Titova

This work is licensed under a Creative Commons Attribution 4.0 International License.

Chimica Techno Acta, 2014-2024
ISSN 2411-1414 (Online)
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