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The incoherent dynamic structure factor for concentrated dispersions of interacting, monodisperse, hard, spherical, colloidal particles has been measured by dynamic light scattering and displays weak but systematic departures from Gaussian behavior. At particle concentrations just below the crystallization transition, these non-Gaussian effects are comparable with those measured and calculated for simple atomic liquids.
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Megen et al. (1988) studied this question.
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