Stable Phase Equilibrium of Aqueous Quaternary System Li+, K+, Mg2+//Borate–H2O at 348 K
Stable Phase Equilibrium of Aqueous Quaternary System Li+, K+, Mg2+//Borate–H2O at 348 K
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DOI：
10.1021/je5008108
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发表时间：
2014-12
影响因子：
0.8
通讯作者：
Qi Tan;Ying Zeng;Pengtao Mu;Xudong Yu;Yujuan Zhang
中科院分区：
文献类型：
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作者：
Qi Tan;Ying Zeng;Pengtao Mu;Xudong Yu;Yujuan Zhang
采用等温溶解法测定了Li+，K+，Mg 2 +//硼酸盐-H2O四元体系在348 K时的溶解度值和平衡溶液的密度、折光率、pH值等物理化学性质。利用测得的数据绘制了相图、含水量图和物理化学性质与组成的关系图。结果表明，该四元体系在348 K时为简单型，无复盐或固溶体形成。该四元体系的稳定相图由一个不变点、三条单变曲线和三个晶相区组成。三水合四硼酸锂（Li 2B 4 O 7·3 H2O）、四水合四硼酸钾（K2 B4 O 7·4 H2O）和硼镁石（MgB 4 O 7·9 H2O）的不动点饱和。MgB_4O_7·9H_2O的晶化场最大，说明硼酸镁盐在共存盐中溶解度最小。对比一下……
The solubility values and physicochemical properties such as densities, refractive indices, and pH values of the equilibrium solution in the quaternary system Li+, K+, Mg2+//borate–H2O at 348 K were measured by isothermal dissolution method. The phase diagram, water content diagram, and the diagrams of the physicochemical properties versus composition were constructed using the measured data. Results show that this quaternary system at 348 K is of a simple type, no double salt or solid solution formed. The stable phase diagram of this quaternary system consists of one invariant point, three univariant curves, and three crystalline phase areas. The invariant point saturated with three salts corresponding to lithium tetraborate trihydrate (Li2B4O7·3H2O), potassium tetraborate tetrahydrate (K2B4O7·4H2O), and hungchaoite (MgB4O7·9H2O). The crystallization field of MgB4O7·9H2O is the maximum, meaning that the salt magnesium borate has the smallest solubility among the coexisting salts. Comparisons between the ...