  Employing the lattice gas model, combined with the linear elasticity theory,
a correlation between the equilibrium and transport properties of intercalated
species is investigated. It is shown that the major features of the
intercalation isotherms and the concentration dependence of the chemical
diffusion coefficient can be well understood in terms of the change of the host
volume in the course of intercalation. Theoretical predictions are compared to
the experimental observations on PdH_x, Li_xWO_3 and Li-graphite systems.
