Estudio por microscopía electrónica de transmisión de saponita activada

Abstract

This work studies the modifications undergone by the Creen Clays Saponite in the Tagus Basin subjected to activation treatments, and stresses the influence of the development of the electronic microscopy technique for studying these materials. Acid treatment with HCI and pillaring treatment with All3 were performed. Characterization of the samples was carried out by DRX, chemical analysis of major elements and Transmission Electronic Microscopy. Add treament causes the delamination and fragmentation of the particles, partially dissolving the octahedral layer and generating amorphous silica, coming from the tetrahedral layer. Pillaring treatment gives rise to a stable solid with inteday.er spácing at 18Á. The high number of crystalline defects present in the saponite conditions the formátion of a low number of pillars per cell