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本文利用X射线散射技术测定和Monte Carlo计算机模拟计算,获得了LiF-KCl熔体的径向分布函数。实验发现,在互易系LiF-KCl熔体中,小离子Li~+与F~-更易形成结合较为紧密的集团,而大离子K~+与Cl~-的结合相对较为松地,即出现“大大小小”效应。

Radial distribution function of molten solution of LiF-KCl reci-procal system has been obtained by means of X-ray scattering and Monte Carlocomputerized simulation, respectively. It is shown that a more compact cluster tendsto form among Li~(+) and F~(-) ions with small size while the bonding of K~(+) andCl~(-) ions with large-size would be relatively relaxed in LiF-KCl melt, i. e. "larger-larger and smaller-smaller" effect.

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