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|Type:||Artigo de periódico|
|Title:||Thermal behavior of alpha-Ba(FeS2)(2) and AgFeS2: quasi-unidimensional and 3D network compounds prepared from ion-exchange on the same precursor|
|Abstract:||Thermal behavior of AgFeS2 and alpha-Ba(FeS2)(2) were studied under air atmosphere. Decomposition products of AgFeS2 are Ag2S, FeS2 (pyrite form), Ag2SO4, alpha-Fe2O3 and metallic silver. a-Ba(FeS2)2 decomposes to pyrite, alpha-Fe2O3 and BaSO4. We propose that metallic sulfide formation on the initial step of the decomposition of these compounds is related to the packing of the metallic ions with sulfur and, hence, with metal-sulfur distances in the original material. Morphological information about AgFeS2 and alpha-Ba(FeS2)(2) are presented for the first time. (C) 1999 Kluwer Academic Publishers.|
|Editor:||Kluwer Academic Publ|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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