A natural occurrence of a silica/clay nanocomposite material was investigated by transmission electron microscopy (TEM) and X-ray powder diffraction (XRD). High-resolution images show that this nanocomposite material consists of 5–20 nm thick slabs of smectite and tridymite/cristobalite layers with coincident normals. In spite of the brittle glass-like appearance of the nanocomposite material its colloidal properties are similar to those of pure smectite but partial loss of expansion capacity was detected upon glycerol solvation. The structural relationship between smectite and silica is interpreted based on the smectite structure model of Edelman and Favejee (1940) which supposes reversed tetrahedra in the SiO4 layer of the TOT structure. This structure model explains the presence of silica impurities in bentonites used as raw material and several geological standard montmorillonites.
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LambertJ-F, BergayaF: Smectite-polymer nanocomposites. In. Handbook of clay science, Eds: BergayaF, LagalyG, Elsevier (2006)
LambertJ-F, BergayaF: Smectite-polymer nanocomposites. In. Handbook of clay science, Eds: BergayaF, LagalyG, Elsevier (2006))| false
Co-Editor-in-Chief: Pavel Hozak (for biomedical sciences)
Filippo Giannazzo - Consiglio Nazionale delle Ricerche (CNR), Institute for Microelectronics and Microsystems (IMM), Catania, Italy
Werner Grogger - FELMI, Graz University of Technology, Graz, Austria
János Lábár - Institute of Technical Physics and Materials Science, Centre for Energy Research, Hungarian Academy of Sciences, Budapest, Hungary
Erik Manders - Faculty of Science, SILS, University of Amsterdam, Amsterdam, The Netherlands
Ohad Medalia - Department of Biochemistry, Zürich University, Zürich, Switzerland
Rainer Pepperkok - EMBL, Heidelberg, Germany
Aleksander Recnik - J. Stefan Institute, Ljubljana, Slovenia
Sara Sandin - Division of Structural Biology & Biochemistry, School of Biological Sciences, Nanyang Technological University, Singapore
Nobuo Tanaka - Electron microscope Lab., Ecotopia Science Institute and Dept. of Applied Physics, Nagoya University, Japan
Paul Verkade - Wolfson Bioimaging Facility, Schools of Biochemistry and Physiology & Pharmacology, Biomedical Sciences Building, University of Bristol, Bristol, UK
Dr Pécz, Béla Resolution and Discovery Institute of Technical Physics and Materials Science Centre for Energy Research, Hungarian Academy of Sciences H-1525 Budapest, PO Box 49, Hungary E-mail: firstname.lastname@example.org