  LixMn2O4 is an important cathode material for the Li ion battery. During
battery charging, the stoichiometry x varies continuously from 1 to zero and on
discharging it varies from zero to one. The cubic lattice constant a of
LixMn2O4 depends on the value of x and the variation of a with x has important
consequences for the battery performance. In this paper, we use a
Madelung-Buckingham model to study this variation and compare the results with
experimental data on LixMn2O4
