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Phase Equilibria in the V2O5-Sb2O4 System

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Abstract

Differential thermal analysis (DTA) and X-ray powder diffraction (XRD) were used to study phase equilibria, established in air in the V2O5-Sb2O4 system up to 1000°C. It has been found that there is a new phase =SbVO5. The =SbVO5 has been prepared by two methods: by heating equimolar mixtures of V2O5 and α-Sb2O4 in air and by oxidation of the known phase of rutile type obtained in pure argon at temperatures between 550 and 650°C. Thermal decomposition of =SbVO5 in the solid state starts at 710°C giving off oxygen. The results provide a basis for constructing only a part of the phase diagram of the investigated system (up to 50.00 mol% Sb2O4).

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  1. Department of Inorganic Chemistry, Technical University of Szczecin, Al. Piastow 42, 11-065, Szczecin, Poland

    E. Filipek

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  1. E. Filipek
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Filipek, E. Phase Equilibria in the V2O5-Sb2O4 System. Journal of Thermal Analysis and Calorimetry 56, 159–165 (1999). https://doi.org/10.1023/A:1010168332278

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