The Structural Model of Monatomic Liquids Including Metallic Liquids near the Melting Points

概要

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Under criticism of the data of atomic radial distribution curves for monatomic liquids, a simple reduced-type structural model of liquids near their melting points having only one parameter is proposed, which is the residual molecular diameter subtracted twice the root-mean-square amplitude of molecular vibration from the mean intermolecular distance, therefore depending on the temperature. Combining this model with the free volume theory several molecular properties of monatomic van der Waals and metallic liquids including spherico-symmetrical molecular liquids are unitarily explained ; for example, at their melting points the shapes and positions of 1st and 2nd peaks in the radial distribution curves, the molar volumes, the self-diffusion coefficients, the viscosity coefficients and the entropies etc., It is also useful to interpret the apparent differences of properties between van der Waals and metallic liquids. And we get some suggestions from this model that the existence of the critical point between the solid and liquid (or fluid) may be possible.
東北大学の論文