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Intercalation Compounds: Covalent and Ionic Approach

Published online by Cambridge University Press:  21 February 2011

Paul Hagenmuller*
Affiliation:
Laboratoire de Chimie du Solide du CNRS, Université de BORDEAUX I, 351 cours de la Libération, 33405 TALENCE Cedex, France
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Abstract

In contrast with amphoteric graphite layer type oxides or chalcogenides play generally the role of acceptors in intercalation reactions. Due to the more ionic character of the M-0 bonds the structural evolution of the oxides may usually be explained on hand of electrostatic considerations, or in terms of cation oxido-reduction. On contrary for the more covalent chalcogenides occupancy of energy levels in the band structure by the transferred electrons constitute a determining factor, influencing strongly not only the structural changes but also the physical properties. Similar bonding considerations account for the strong tendency of the oxides to undergo 2D → 3D transformations.

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Type
Research Article
Copyright
Copyright © Materials Research Society 1989

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