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Neutron Diffraction Studies on the Structure and Conduction Mechanism in Al, Ga—DOPED Li4SiO4

Published online by Cambridge University Press:  28 February 2011

R.I. Smith  and
A.R. West
R.I. Smith
Affiliation:
University of Aberdeen, Department of Chemistry, Meston Walk, Aberdeen AB9 2UE, Scotland.
A.R. West
Affiliation:
University of Aberdeen, Department of Chemistry, Meston Walk, Aberdeen AB9 2UE, Scotland.
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Abstract

Crystallographic results on the Li4-3x(Al,Ga)xSiO4 solid solutions are reviewed. The six sets of sites available for Li+ ions fall into two groups. The ‘framework’ sites, which also contain the substitutional Al,Ga ions, appear to have little effect on conductivity. The ‘channel’sites contain varying amounts of Li+ ions and are responsible for the dramatic variations in conductivity with x. There is evidence for the presence of one—dimensional defects, comprising columns of ordered Li+ ions, in both the framework and channel sites. The relative numbers of these linear defects has a large bearing on the solid solution mechanism in the framework sites and their occurrence in the channel sites may be responsible for the low conductivity in stoichiometric Li4SiO4.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 210: Symposium L – Solid State Ionics II , 1990 , 593
Copyright
Copyright © Materials Research Society 1991

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References

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