Titlebook: LACAME 2004; Proceedings of the 9 R. C. Mercader,J. R. Gancedo,E. Baggio-Saitovitch Conference proceedings 2005 Springer-Verlag Berlin Heid

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Effect of the Calcination Atmosphere on the Structural Properties of the Reduced Fe/SiO2 System,ied the influence of the calcination atmosphere (air or nitrogen) on the iron oxide reducibility and the metallic iron particle size obtained in Fe/SiO. system. We have impregnated a silicagel with Fe(NO.). · 9H.O aqueous solution and the solid obtained was calcinated in air or N2 stream. These prec

indifferent

,NMR and M?ssbauer Study of Al2O3-Eu2O3,e prepared by the sol-gel technique. The XRD patterns for the calcined samples show a broad peak around 2θ = 30° which is assigned to the Eu.O.; after treatment with hydrogen at 1073 K no reduction to Eu. or Eu. was observed. The NMR spectra show three peaks, which are assigned to the octahedral, pe

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,Hydrometallurgical Extraction of Zinc and Copper — A 57Fe-M?ssbauer and XRD Approach,g process. In the present investigation a zinc-copper ore from the Maranda mine, located in the Murchison Greenstone Belt, South Africa, containing sphalerite (ZnS) and chalcopyrite (CuFeS.), was studied. The .Fe-M?ssbauer spectrum of the concentrate yielded pyrite, chalcopyrite and clinochlore, con

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infringe

,Structural and Electronic Properties Study of Colombian Aurifer Soils by M?ssbauer Spectroscopy anderous samples are from the El Diamante mine, located in Guachavez-Narin?o (Colombia) and were prepared by means of polished thin sections. The petrography analysis registered the presence, in different percentages that depend on the sample, of pyrite, quartz, arsenopyirite, sphalerite, chalcopyrite

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