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  • Author or Editor: I. Rychlowska-Himmel x
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Abstract  

A phase diagram of the V2O5–Fe8V10W16O85 system were carried out using XRD and DTA methods. In addition, an indexing of Fe8V10W16O85 powder diffraction pattern was made and its basic crystallographic parameters were determined. Finally, the phase was studied using IR spectroscopy.

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Abstract  

A study of synthesis and thermal decomposition of the Zn4V2O9 have been conducted by XRD method using a high-temperature X-ray attachment. A melting temperature and the way of melting that compound have been established.

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Abstract  

The reaction mechanism of the synthesis of Fe8V10W16O85 was studied by means of XRD, IR spectroscopy and DTA techniques. It was found that the intermediate in the reaction may be either FeVO4 or FeVO4 admixed with an unidentified phase X, depending on the reaction temperature. The IR spectrum of the phase Fe8V10W16O85 is reported for the first time.

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Abstract  

As a result of solid-state reactions four chromium(III) phosphates(V) have been obtained, i.e. Cr(PO3)3, Cr4(P2O7)3, Cr2P4O13 and CrPO4. Cr2P4O13 has been obtained as a result of a solid-state reaction between Cr2O3 and (NH4)2HPO4 as well as between CrPO4 and Cr(PO3)3 mixed at a molar ratio of 1:1 or between Cr4(P2O7)3 and Cr(PO3)3 mixed at a molar ratio of 1:2. Melting temperatures and the products of thermal decomposition have been determined for the obtained chromium(III) phosphates(V).

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Abstract

Thermal stability of a compound forming in a binary system MoO3–In2O3 was investigated by DTA/TG, XRD and SEM methods in this study. For the first time, the diagram of phase equilibria established in the whole range of concentrations of this system's components has been constructed. The temperature and concentration ranges of the components of MoO3–In2O3 system in which the compound In2(MoO4)3 co-exists in solid state with MoO3 or In2O3 or with the liquid were determined. The composition and melting point of the eutectic mixture consisting of In2(MoO4)3 and MoO3 were found.

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