Metastable Phase Equilibrium in the Aqueous Ternary System Li2SO4 +MgSO4 + H2O at 323.15 K
Metastable Phase Equilibrium in the Aqueous Ternary System Li2SO4 +MgSO4 + H2O at 323.15 K
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DOI：
10.1021/je200429a
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发表时间：
2011-08
影响因子：
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通讯作者：
T. Deng;H. Yin;Dongchan Li
中科院分区：
文献类型：
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作者：
T. Deng;H. Yin;Dongchan Li
采用等温蒸发法测定了三元体系（Li2SO4 + MgSO4 + H2O）在323.15 K下的亚稳溶解度和物理化学性质（密度和折射率）。根据实验结果，绘制了亚稳相图和理化性质随组成的关系图。结果表明，在亚稳三元体系中存在一个共晶点（Li2SO4·H2O + MgSO4·6H2O），两条不变曲线，以及对应于一水硫酸锂（Li2SO4·H2O）和六水硫酸锂（MgSO4·6H2O）的两个结晶区。该体系属于简单共晶型，既没有重盐，也没有固溶体。可以发现，亚稳三元体系的溶液密度和折射率随硫酸锂含量的变化有规律地变化，且均在共晶点处达到最大值。密度和折射率的计算值与经验方程吻合较好。
The metastable solubilities and physicochemical properties (densities and refractive index) of the aqueous ternary system (Li2SO4 + MgSO4 + H2O) at 323.15 K were determined by the isothermal evaporation method. According to the experimental results, the metastable phase diagram and the diagram of physicochemical properties versus composition were plotted. It was found that there are one eutectic point (Li2SO4·H2O + MgSO4·6H2O), two univariant curves, and two crystallization regions corresponding to lithium sulfate monohydrate (Li2SO4·H2O) and hexahydrite (MgSO4·6H2O) in the metastable ternary system. The system belongs to a simple eutectic type, and neither double salts nor solid solutions were found. It can be found that the solution density and refractive index of the metastable ternary system changed regularly with the content change of lithium sulfate, and all reach the maximum value at eutectic point. The calculated values of densities and refractive index with empirical equations are in good agreeme...