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Type: Artigo
Title: Formation of oxysulfide LnO2S2 and oxysulfate LnO2SO4 phases in the thermal decomposition process of lanthanide sulfonates (Ln = La, Sm)
Author: Machado, Luiz Carlos
Azeredo, Marcos Tadeu D’Orlando de
Corrêa, Hamilton Perez Soares
Matos, Jivaldo do Rosário
Mazali, Ítalo Odone
Abstract: This study investigates two lanthanide compounds (La3+ and Sm3+) obtained in water/ethyl alcohol solutions employing the anionic surfactant diphenyl-4-amine sulfonate (DAS) as ligand. Both sulfonates were characterized through IR, TG/DTG (O2 and N2). The thermal treatment of both compounds at 1273 K under air leaves residues containing variable percentages of lanthanide oxysulfide/oxysulfate phases shown by synchrotron high-resolution XRD pattern including the Rietveld analysis. The phase distributions found in the residues evidence the differences in the relative stability of the precursors
Subject: Rietveld, Método de
Country: Hungria
Editor: Springer
Rights: Fechado
Identifier DOI: 10.1007/s10973-011-1451-7
Date Issue: 2012
Appears in Collections:IQ - Artigos e Outros Documentos

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