EPR, FT-IR and XRD investigation of soils from paraná, brazil - Siqueira, E; Andrade, M. M; Valezi, Daniel Farinha; Carneiro, Cristine Elizabeth Alvarenga; Pinese, José Paulo Peccinini; Costa, A. C. S. da; Zaia, Dimas; Ralisch, R; Guedes, C. L. B; Mauro, E Di; Pontuschka, Walter Maigon (Applied Clay Science, 2011)