Produção Nacional
Revisado por pares
Structural and Morphological Characterization of the PP-0559 Kaolinite from the Brazilian Amazon Region
2002; Brazilian Chemical Society; Volume: 13; Issue: 2 Linguagem: Inglês
10.1590/s0103-50532002000200021
ISSN1678-4790
AutoresKátia Cylene Lombardi, José Luís de Barros Guimarães, Antônio S. Mangrich, N. Mattoso, M. Abbate, W. H. Schreiner, Fernando Wypych,
Tópico(s)Clay minerals and soil interactions
ResumoWe report a structural and morphological characterization of the natural kaolinite PP-0559, from the Brazilian Amazon region, with the aim to contribute to the understanding of this clay mineral in environmental redox reactions. The triclinic structure was confirmed by transmission electron microscopy and electron diffraction studies. It exhibits oriented crystals, with diameters between 0.2 and 2 mum and about 50 nm of thickness. The anisotropic crystals after orientation were studied by electron paramagnetic resonance as a function of the applied magnetic field. The main EPR absorption lines of the substitutional Fe+3 impurity and radiation induced paramagnetic centers were studied as possible oxidizing centers of kaolinite.
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