Critical evaluation of partial molar volumes and excess partial molar volumes of molten fluoride melts

被引：0
|
作者：
Blanka Kubíková
Miroslav Boča
Jarmila Mlynáriková
Zuzana Netriová
Zuzana Vasková
机构：
[1] Slovak Academy of Sciences,Department of Molten Systems, Institute of Inorganic Chemistry
来源：
Journal of Thermal Analysis and Calorimetry | 2016年 / 125卷
关键词：
Density; Molar volume; Partial molar volume and excess partial molar volume; Molten fluoride salts;
D O I：
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中图分类号：
学科分类号：
摘要：
Different procedures of evaluation of partial molar volume and excess partial molar volume have been applied for three binary or quasi-binary molten fluoride systems: KF–K2TaF7, K2ZrF6–K2TaF7 and (LiF–NaF–KF)eut–K2ZrF6. In the first procedure partial molar volume is calculated based on mathematical fitting of molar volume, while in the second procedure partial molar volume is calculated based on mathematical fitting of excess molar volume. It was shown that both procedures are in principle consistent. However, some inconsistencies on values of partial molar volume can occur when local extremes are observed on concentration dependence of molar volume. In such situation, proper selection of mathematical functions is essential which requires relatively high density of experimental data. Moreover, when data on only restricted concentration range are available, only procedure of molar volume fitting is applicable for calculation of partial molar volume.
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页码：497 / 508
页数：11
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