X-ray powder diffraction study of chromium-vanadium oxide compounds prepared by “soft chemistry” methods

• Authors: O. Pozdnyakova , J. Megyeri , E. Kuzmann , L. Szirtes
• Languages of publication: EN

Abstracts

EN

A novel aqueous method was used to synthesise mixed chromium-vanadium oxide hydrates with various chromium content, via the reaction of peroxo-polyacids of chromium and vanadium. The resulting materials are gelatinous. The dehydration of the gels result in a brown coloured amorphous powder. Depending on the chromium content, the compounds have a different characteristic crystallisation temperature upon the further heating. The crystalline compounds, except for the low chromium ones, go on a phase transition and decompose with increasing temperature.By refining the XRPD measurement data of the compounds, the type and parameters of the unit cells were determined. The experimental data were in concordance with the calculated values, using the PWC code. The lattice parameters and the crystalline structure were changed with the variation of chromium content.

Keywords

EN

Sol-gel synthesis; crystal structure; x-ray diffraction; chromium-vanadium oxide

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2006
• Volume: 4
• Issue: 4
• Pages: 760-772

Dates

published

1 - 12 - 2006

online

1 - 12 - 2006

Contributors

author

O. Pozdnyakova

• Institute of Isotopes, Hungarian Academy of Sciences, P.O. Box 77, H-1525, Budapest, Hungary

author

J. Megyeri

• Institute of Isotopes, Hungarian Academy of Sciences, P.O. Box 77, H-1525, Budapest, Hungary

author

E. Kuzmann

• Department of Nuclear Chemistry, Research Group of Nuclear Methods in Structural Chemistry HAS, Eötvös Lóránd University, P.O. Box 32, H-1518, Budapest, Hungary

author

L. Szirtes

• Institute of Isotopes, Hungarian Academy of Sciences, P.O. Box 77, H-1525, Budapest, Hungary

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Identifiers

DOI

10.2478/s11532-006-0043-z