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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

Chapter:
(p.242) 10 Intercalation compounds
Source:
Quasielastic Neutron Scattering and Solid State Diffusion
Author(s):

Rolf Hempelmann

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198517436.003.0010

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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