Phase diagrams for alkali metal graphite intercalation compounds

The model of staging recently proposed by Millman and Kirczenow (1982) (MK) is used to examine the phase diagrams predicted for alkali metal graphite intercalation compounds. For both attractive and repulsive in-plane interactions the finite-temperature calculations based on this model yield the staged structures which are observed experimentally. The differences between the predictions of the MK model and those of other models, possible improvements to the MK model, and the implications for experiment are also discussed.