Effect of temperature and pressure on mixed oxide solid solutions

M. Yu Petrushina, E. S. Dedova, K. V. Yusenko, A. S. Portnyagin, E. K. Papynov, E. Yu Filatov, S. V. Korenev, A. I. Gubanov

Research output: Contribution to journalArticlepeer-review

Abstract

A hydrothermal synthesis of ZrW2-xMoxO8 (0 ≤ x ≤ 2) from the corresponding precursors is reported in this paper. High-temperature and high-pressure data are presented for the sample with x = 1.6. An increase in temperature initiates the phase transition from tetragonal precursor to orthorhombic-ZrW2-xMoxO8 (x = 1.6) with the subsequent formation of cubic and trigonal phases. The thermolysis parameter of the disordered cubic ZrW2-xMoxO8 (x = 1.6) phase is 803 K, and the coefficient of thermal expansion is α = -4.6∙10–6 K−1. Data on ZrW2-xMoxO8 (x = 1.6) structure as a function of pressure are obtained for the first time. Pressure-induced changes from cubic to orthorhombic ZrW2-xMoxO8 (x = 1.6) phase at 1.38 GPa are observed. The sample amorphization is irreversible during decompression.

Original languageEnglish
Article number107965
Number of pages4
JournalInorganic Chemistry Communications
Volume117
DOIs
Publication statusPublished - Jul 2020

Keywords

  • NEGATIVE THERMAL-EXPANSION
  • ZRW2O8
  • COMPRESSIBILITY
  • TRANSITIONS

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