Diffuse scattering from fullerenes

Fullerene solids exhibit textbook examples of orientational freezing transi tions, i.e. structural transitions from a high temperature phase, where the molecules undergo rapid reorientation, to a low temperature phase where th e molecules are locked-in into discrete orientations. In general, even low temperature phases are not completely ordered because of frozen-in orientat ional disorder, partly also because of a high density of stacking faults. D iffuse scattering has been used extensively to characterize both dynamic an d static disorder in fullerene solids. A review is given on the experimenta l results as well as on the various techniques employed to analyze the data .