Abstract
Mixtures of xenon and krypton adsorbed on graphite at 45 K are studied by X ray diffraction. Two kinds of incommensurate and one kind of commensurate solids were observed The coexistence of each incommensurate with the commensurate structure indicates first order C - I transitions. Diffraction spectra with low coverage (about 0.1) show that small platelets are first covered and that they favour an incommensurate solid The limit of the incommensurate xenon-like structure seems inconsistent with results on an argon-xenon mixture. Explanation could be a less ordered structure for the latter mixture.
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