Orientational Locking of Incommensurate Lattices in Mental Chloride GICs
In the study of the structures of GIC the orientational locking of incommensurate lattices is a challenging problem: Although the incommensurability of the graphite and the intercalate in-plane lattice indicates that host-guest interactions are weaker than the interactions between the intercalate molecules, most of the incommensurate intercalate lattices exhibit a definite rotational orientation δ with regard to the axis of the hexagonal in-plane lattice of graphite . In order to look for the reasons of this astonishingly behaviour we turned to the study of metal di- and trichloride GICs with simple in-plane structures of the intercalate. These structures are shown in Fig. 1. They consist of a double layer of close-packed chlorine atoms. Metal atoms occupy all or two thirds of all octahedral sites of this double layer, leading to stoichiometries MeC12 and MeC13 resp., for the metal chloride layer.
KeywordsDouble Layer Rotation Angle Metal Atom Chlorine Atom Octahedral Site
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