Formation of chromium interlayers in α-zirconium phosphate
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 5,p. 895-899
- https://doi.org/10.1039/dt9890000895
Abstract
Interlayered materials with basal spacings 15–26 Å, obtained when the half-sodium-exchanged form of α-zirconium bis(hydrogenphosphate) is refluxed with solutions of chromium(III) acetate, have been studied by thermal analysis, X-ray powder diffraction, electron microscopy, e.s.r. and i.r spectroscopy; surface areas were also determined. The reaction causes expansion of the interlayer spacing, to a degree depending on the initial chromium content of the solution and the temperature. The results are interpreted in terms of the formation of a hydrous chromium acetate interlayer species which decomposes on heating between 300 and 400 °C. The surface area of the α-zirconium phosphate does not change appreciably on reaction with chromium(III) acetate indicating that interlayer crowding effects play a dominant role.Keywords
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