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Thermophysical Properties of Group IVB Liquids Obtained from Diffraction Data

机译:从衍射数据获得的IVB组液体的热物理性质

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In this paper we present the thermophysical properties of the group IVB liquids obtained from X-ray diffraction data. First of all, we calculate the pair and triplet correlation entropies (S~((2)) and S~((3))) from the measured diffraction data. Next, assuming that the excess entropy of ion disorder alone (i.e., ion configurational entropy) S_E is given as S~((2)) + S~((3)) we calculate the self-diffusion coefficient D based on Dzugutov's scaling law. By means of D, we estimate the viscosity coefficient η and the surface tension γ for liquid Si, Ge, Sn and Pb using the Stokes-Einstein relation, the Born-Green equation and Fowler's formula for the surface tension. We can find there exists a clear relationship between S_E, D, η and γ. Predicted values of D, η and γ for the group IVB liquids are reasonable in size in comparison with the available experimental data.
机译:在本文中,我们介绍了从X射线衍射数据获得的IVB类液体的热物理性质。首先,我们从测得的衍射数据计算出对和三重态相关熵(S〜((2))和S〜((3)))。接下来,假设仅将离子无序的过量熵(即离子构型熵)S_E设为S〜((2))+ S〜((3)),我们将根据Dzugutov的定标律计算自扩散系数D 。借助D,我们使用Stokes-Einstein关系,Born-Green方程和Fowler公式来估计液体Si,Ge,Sn和Pb的粘度系数η和表面张力γ。我们发现S_E,D,η和γ之间存在明确的关系。与现有的实验数据相比,IVB类液体的D,η和γ的预测值在尺寸上是合理的。

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