Ln（ClO_4）_3－DAPTU－H_2O三元体系30℃时的相平衡研究

Studies on Phase Equilibrium of Ln(ClO_4)_3-DAPTU-H_2O Ternary System at 30℃

测定了Ｌｎ（ＣｌＯ_４）_３－ＤＡＰＴＵ－Ｈ_２Ｏ（Ｌｎ＝Ｌａ，Ｓｍ，Ｙｂ）三元体系在３０℃时的溶解度及饱和溶液的折光率，绘制了相应的溶度图和折光率－组成图，各体系的溶度曲线和折光率曲线均由三支组成，分别与ＤＡＰＴＵ、Ｌｎ（ＤＡＰＴＵ）_２（ＣｌＯ_４）_３·８Ｈ_２Ｏ（Ｌｎ＝Ｌａ，Ｓｍ，Ｙｂ）和Ｌｎ（ＣｌＯ_４）_３·ｎＨ_２Ｏ（Ｌｎ＝Ｌａ，ｎ＝８；Ｓｍ，ｎ＝９；Ｙｂ，ｎ＝８）相对应。从溶度图上发现了３个未见文献报道的固液异组成溶解的化合物，通过化学分析及元素分析、ＴＧ－ＤＴＧ、ＩＲ对其进行了表征。

The solubilities and the refractive indexes of saturated solutions of the title systems at 30℃ have been studied and the corresponding equilibrium solubility diagrams and refractive index diagrams were drawn.All the solubility curves and refractive index curves of these systems consist of three branches,corresponding to DAPTU,Ln( DAPTU)_2( ClO_4)_3.8H_2O(Ln=La,Sm,Yb) and Ln( ClO_4)_3.mH_2O(Ln=La,n=8;Sm,n=9;Yb,n=8),respectively.All the three ternary compounds formed in the title systems are new compounds reported for the first time in this paper.They are of incongruity in water.They were characterized by chemical analysis,elemental analysis,TG-DTG and IR spectra.