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中文摘要：
采用等温蒸发法研究了Li2SO4-Na2SO4-H2O体系308.15K介稳相平衡及平衡液相物化性质（密度、电导率、折光率、粘度）,根据实验数据绘制了相应的介稳相图及物化性质组成图。研究发现：该介稳体系中有2种复盐,即Db1（Li2SO4.3Na2SO4.12H2O）和Db2（Li2SO4.Na2SO4）形成,其介稳相图中有三个共饱点、4条溶解度曲线和4个结晶相区。
英文摘要：
The metastable phase equilibria and the physicochemical properties （density, refractive index, conductivity and viscosity） of the ternary system Li2SO4 - Na2SO4 - H2O at 308.15 K were studied using the isothermal evaporation method. According to the experimental data, the metastable equilibrium phase diagram and physicochemical properties composition diagram were plotted. The experimental results of the metastable equilibria show that the double salts of Dbl （Li2SO4 · 3Na2SO4 · 12H2O） and Db2 （Li2SO4 · Na2SO4 ） are formed in the ternary system Li2SO4 - Na2SO4 - H2O at 308.15 K. In the metastable phase diagram, the ternary system has three eutectic points, four solubility curves, and four crystallized regions corresponding to minerals of Li2SO4 · H2O, Li2SO4 · Na2SO4, Li2SO4· 3Na2SO4 · 12H2O, and Na2SO4.
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