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Quasielastic Neutron Scattering and Solid State Diffusion$
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Rolf Hempelmann

Print publication date: 2000

Print ISBN-13: 9780198517436

Published to Oxford Scholarship Online: January 2010

DOI: 10.1093/acprof:oso/9780198517436.001.0001

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Intercalation compounds

Intercalation compounds

(p.242) 10 Intercalation compounds
Quasielastic Neutron Scattering and Solid State Diffusion

Rolf Hempelmann

Oxford University Press

This chapter discusses the diffusional dynamics in intercalation compounds of graphite with alkali metals. These form two classes: stage 1 compounds like C6Li, and stage 2 compounds like C24Rb. HNO3 has also been intercalated in graphite and studied by QENS. All these systems exhibit interesting transitions between commensurate and incommensurate structures which influences the diffusivity. A two-dimensional Chudley–Elliott model is applied. A few studies in the literature deal with ionic compounds with channels or layers. An example is the Chevrel phase Ni2Mo6S8: the Q dependence of the linewidths establishes fast long-range motion of the intercalated Ni2+ ions.

Keywords:   graphite, intercalation compounds, Chevrel phases

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