| Autor: |
M. Luz Rodríguez, Marta Suárez, Julio Rodríguez, L. M. Barcina, Ricardo Llavona |
| Rok vydání: |
1998 |
| Předmět: |
|
| Zdroj: |
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 311:263-268 |
| ISSN: |
1058-725X |
| Popis: |
The reactions of chromium (III) acetate Cr(OAc)3 (OAc˭CH3OCO) solutions with suspensions of n-propylamine / α-hamium phosphate [Hf(HPO4)2·2C3H7NH2·H2O] (Apr-HfP) have been investigated over a wide range of Cr(OAc)3 concentrations and heating conditions. The interlayered materials obtained have been studied by chemical and thermal analysis, X-ray powder diffraction, electron microscopy and IR 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. The results are interpreted in terms of the formation of hydrous chromium acetate interlayer species which decompose on heating between 350–450°C. The surface area of the α-hamium phosphate increases after the reaction with chromium (III) acetate and in the samples thermally treated. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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