Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/70344
Type: Artigo de periódico
Title: Probing the thermal decomposition process of layered double hydroxides through in situ Fe-57 Mossbauer and in situ X-ray diffraction experiments
Author: Gouveia, DX
Ferreira, OP
Souza, AG
da Silva, MG
de Paiva, JAC
Alves, OL
Mendes, J
Abstract: The thermal decomposition properties of Mg-Fe hydrotalcites were studied through in situ Fe-57 Mossbauer spectroscopy and in situ X-ray diffraction. Abrupt changes in the quadrupolar splitting measured in the Mossbauer spectra revealed a phase transition from the starting lamellar structure to a new crystalline arrangement. By analyzing the Mossbauer parameters we show that the material is highly disordered in the 300-400 degrees C temperature range. This hypothesis is confirmed by the X-ray results whose diffractograms indicated the collapse of the lamellar structure and the formation of a solid solution.
Country: EUA
Editor: Springer
Rights: fechado
Identifier DOI: 10.1007/s10853-006-1143-z
Date Issue: 2007
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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