Imágenes de la estructura molecular y/o atómica superficial de vermiculita obtenidas con AFM

• Autores: Celia Marcos Pascual, I. Rodríguez Santalla, L.C. de Rennó, J.I. Paredes
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 1, 4, 2000 (Ejemplar dedicado a: V Congreso Geológico de España (Alicante, 10-14 julio 2000)), págs. 41-42
• Idioma: español
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• Resumen

  • The surface atomic and/or molecular structure of vermiculites, from different places, were imaged using an atomic force microscope (AFM) in contact mode in air. Vermiculite mineral is a 2:1 phyllosilicate with two sheets: each one consist of a talc-like layer and a brucite-like interlayer sandwiched between them, the repetition unit being of 28,89 A. The AFM show the OFI groups of the brucite-like interlayer sheet and the oxygens of the bases of the silicon tetrahedra of the talc-like sheet. The imaged surface atomic structures of both sheets are consistent with that of the bulk structure, although some structural relaxation is observed.