Abstract
We have performed a comprehensive x-ray scattering study of ${\mathrm{CCl}}_{4}$ adsorbed on exfoliated graphite. We observe the following features. At low coverages, there is an incommensurate triangular monolayer solid, with a gas-liquid-solid triple point at 195 K. Below a temperature of 215 K the graphite is partially wet by only one monolayer. The monolayer solid has a maximum melting temperature of \ensuremath{\sim}246 K. A two-layer solid phase, which melts at 236 K, does not have a simple triangular structure. There is a liquid prewetting film of at least ten layers thickness at 246 K, 4 K below the bulk ${\mathrm{CCl}}_{4}$ triple point.
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