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中文摘要：
采用等温溶解平衡法研究了三元体系Mg2＋//Cl-,borate—H2O在323.15 K时的溶解度及其平衡溶液的物化性质（密度、折光率、pH、电导率）。根据实验数据绘制了相应的平衡相图及其物化性质组成图。发现了镁硼酸盐的转化现象,并用n（三氧化二硼）/n（氧化镁）来表示;该体系在323.15 K时相图中有1个共饱点（水氯镁石＋镁硼酸盐）,2条单变量溶解度曲线（分别对应镁硼酸盐和水氯镁石的溶解度曲线）,2个结晶相区（分别为水氯镁石和镁硼酸盐）。
英文摘要：
Solubilities and physicochemical properties including density,refraction,pH,and conductivity for the aqueous ternary system（Mg2＋//Cl-,borate-H2O） at 323.15 K have been investigated by isothermal equilibrium method.On the basis of the experimental data,the equilibrious phase diagram and composition diagram of physicochemical properties were plotted.Conversion phenomenon of Mg-borates had been found and the amount-of-substance ratio of B2O3 to MgO was used to express the conversion.In the phase diagram of the ternary system,there were one invariant point（bischofite＋Mg-borates）,two univariant curves（corresponding to solubility curves of Mg-borates and bischofite）,and two crystallization regions（bischofite and Mg-borates）at 323.15 K.
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