化工矿物与加工2025，Vol.54Issue(7)：41-46,6.DOI:10.16283/j.cnki.hgkwyjg.2025.07.006
三元体系Rb2SO4+Cs2SO4+H2O 273.2K固液相平衡研究
Solid-liquid equlibria(SLE)of the aqueous ternary system Rb2SO4+Cs2SO4+H2O at 273.2K
摘要
Abstract
In order to obtain the crystallization laws of various salts in the coexisting system of rubidium cesium sul-fate,the solid-liquid phase equilibrium data of the ternary system Rb2SO4+Cs2SO4+H2O at 273.2 K were obtained by isothermal equilibrium dissolution method.The equilibrium solid phase at the invariant point was characterized by X-ray diffraction(XRD),and the phase diagram,density-composition diagram,and multi-temperature comparison diagram were drawn based on the experimental data.The results show that at 273.2 K,the solid solution[(Rb,Cs)2SO4]is generated in the system,which belongs to a complex system.Its phase diagram consists of two ternary invariant points,three univariate curves,and three crystalline phase regions.The order of the size of the crystalline region is[(Rb,Cs)2SO4]>Rb2SO4>Cs2SO4;The multi temperature phase diagrams at 273.2,298.2,and 323.2 K all consist of two ternary invariant points,three univariate curves,and three crystalline phase regions,namely solid solution[(Rb,Cs)2SO4]and single salt Rb2SO4,Cs2SO4.As the temperature increases,the crystalline phase region of solid solution[(Rb,Cs)2SO4]decreases.关键词
相平衡/硫酸铷/硫酸铯/固溶体/多温相图/结晶相区Key words
phase equilibrium/rubidium sulfate/cesium sulfate/solid solution/multi-temperature phase diagram/crystalline phase region分类
轻工纺织引用本文复制引用
俞章法,曾英,李学群,孙洪波,王科,于旭东..三元体系Rb2SO4+Cs2SO4+H2O 273.2K固液相平衡研究[J].化工矿物与加工,2025,54(7):41-46,6.基金项目
国家自然科学基金项目(U1607121) （U1607121）
中信集团十大科技创新项目(2023ZXKYA05100). （2023ZXKYA05100）
