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

• Autorzy: O. Pozdnyakova , J. Megyeri , E. Kuzmann , L. Szirtes
• Języki publikacji: EN

Abstrakty

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.

Słowa kluczowe

EN

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

• Czasopismo: Open Chemistry
• Rocznik: 2006
• Tom: 4
• Numer: 4
• Strony: 760-772

Daty

wydano

2006-12-01

online

2006-12-01

Twórcy

autor

O. Pozdnyakova

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

autor

J. Megyeri

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

autor

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

autor

L. Szirtes

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

Bibliografia

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Identyfikatory

DOI

10.2478/s11532-006-0043-z