| Summary: | This thesis describes experimental methods, including in situ
X-ray diffraction, especially suited to the study of lithium intercalation
systems,and discusses the interpretation of the results obtained in a
study of Li[sub=x]TiS₂. A rigid plate and spring model of layered intercalation
systems is developed and is used to investigate the role of lattice
expansion and elastic energy in layered intercalation compounds. When the
elastic energy, calculated using the spring and plate model, is included
in the Hamiltonian of a three dimensional lattice gas model for Li[sub=x]TiS₂
good agreement between the experimental results and the theoretical predictions are obtained. Staging, not lithium ordering, is identified as the dominant physical mechanism in Li[sub=x]TiS₂. === Science, Faculty of === Physics and Astronomy, Department of === Graduate
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