摘要
采用等温溶解平衡法研究了三元体系Rb+∥Cl-,borate-H2O 348 K时的稳定相关系。测定了该三元体系348 K时的平衡液相组成和主要物化性质(密度、折光率)。根据实验数据绘制了相应的等温溶解度图,物化性质-组成图。研究发现:该体系属于简单共饱型,无复盐或固溶体形成。相图含有1个共饱点,2条溶解度单变量曲线以及2个单盐结晶相区,分别对应RbCl和RbB5O8·4H2O结晶区。该体系RbCl结晶区面积小,溶解度大;RbB5O8·4H2O结晶区面积大,溶解度小。平衡液相的密度和折光率随着RbCl含量的增大而增大,在共饱点E处达到最大值。
The solubility, density, and refractive index of the solution in the ternary system Rb ＋//Cl- , borate-H2O at 348 K were determined using an isothermal dissolution method. The stable phase diagram, density vs composition diagram and refractive index vs composition diagram were plotted based on data obtained from the experiment. The stable phase diagram consisted of one invariant point, two univariant curves and two crystallization areas corresponding to single salts RbCl, RbB5O8.4H2O. The crystallization area of RbC1 was smaller while that of RbB5O8 .4H2O was bigger, which indicated the solubility of salt RbCI was larger than the solubility of salt RbB5 O8 .4H2O. The density and refractive index of the equilibrated solution increased with the decrease of concentration of RbCI and reached a maximum at invariant point E.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2013年第1期104-107,共4页
Chinese Journal of Rare Metals
基金
国家科技部863主题项目课题(2012AA061704)
国家自然科学基金资助项目(41173071)
教育部博士点基金项目(20115122110001)
中国地质调查局地质调查项目子课题(1212011085523)资助
关键词
溶解度
相平衡
铷
硼酸盐
solubility
phase equilibrium
rubidium
borate
