The solubilities of salts in ternary system LiCl–SrCl₂–H₂O at 288.15 K and quaternary system LiCl–KCl–SrCl₂–H₂O at 288.15 and 323.15 K were determined using the isothermal dissolution equilibrium method. According to the experimental data, the equilibrium phase diagram of the two systems mentioned above was drawn, respectively. The equilibrium phase diagram of the ternary system at 288.15 K has two invariant points, three univariant curves, and three crystallization regions, where the solids are LiCl·2H₂O, SrCl₂·2H₂O, and SrCl₂·6H₂O. The equilibrium phase diagram of the quaternary system at 288.15 K has two invariant points, four univariant curves, and four crystallization regions, where the solids are SrCl₂·6H₂O, SrCl₂·2H₂O, LiCl·2H₂O, and KCl. The equilibrium phase diagram of this quaternary system at 323.15 K has three invariant points, seven univariant curves, and five crystallization regions, where the solids are LiCl·H₂O, SrCl₂·H₂O, SrCl₂·2H₂O, SrCl₂·6H₂O, and KCl. The phase equilibria of the two systems at different temperatures are compared and discussed.

中文翻译：

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三元体系 LiCl-SrCl2-H2O 在 288.15 K 和四元体系 LiCl-KCl-SrCl2-H2O 在 288.15 和 323.15 K 中的相平衡研究

使用等温溶解平衡法测定盐在288.15 K三元体系 LiCl-SrCl ₂ -H ₂ O 和四元体系 LiCl-KCl-SrCl ₂ -H ₂ O 在 288.15 和 323.15 K 中的溶解度。根据实验数据，分别绘制了上述两种体系的平衡相图。三元体系在288.15 K的平衡相图有两个不变点、三个单变曲线和三个结晶区，其中固体为LiCl·2H ₂ O、SrCl ₂ ·2H ₂ O和SrCl ₂ ·6H ₂O.四元体系在288.15 K的平衡相图有两个不变点、四个单变曲线和四个结晶区，其中固体为SrCl ₂ ·6H ₂ O、SrCl ₂ ·2H ₂ O、LiCl·2H ₂ O ，和氯化钾。该四元体系在 323.15 K 的平衡相图具有三个不变点、七个单变曲线和五个结晶区，其中固体为 LiCl·H ₂ O、SrCl ₂ ·H ₂ O、SrCl ₂ ·2H ₂ O、SrCl ₂ ·6H ₂O，和氯化钾。比较和讨论了两个系统在不同温度下的相平衡。