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采用湿渣法研究了0℃时REI3 CS(NH2)2 H2O(RE=Eu,Yb)的三元体系相平衡,绘制了该体系的等温溶解度相图,相图分析结果表明,该体系中有组成为REI3·2CS(NH2)2·10H2O的新配合物生成,该配合物在相图中的结晶区较小,且异组成溶解于水。对所得配合物组成进行的化学分析结果与相图分析一致,采用X射线粉末衍射分析对所得配合物的物相进行了鉴定,采用红外光谱、差热 热重分析法表征了配合物的结构和热稳定性,结果表明:配合物中稀土离子与H2O和CS(NH2)2中的S作用。
The phase equilibrium of ternary system of REI3CS (NH2) 2 H2O (RE = Eu, Yb) at 0 ℃ was studied by means of the wet slag method. The isothermal solubility phase diagram of the system was plotted. The phase diagram analysis showed that there are A new complex composed of REI3.2CS (NH2) 2 · 10H2O was formed. The complex has a smaller crystalline region in the phase diagram and the different composition dissolves in water. The results of the chemical analysis of the obtained complex are consistent with those of the phase diagram. The phase of the obtained complex was identified by X-ray powder diffraction analysis. The structure of the complex was characterized by infrared spectroscopy and differential thermal gravimetric analysis The results show that the rare earth ions in the complexes react with S in H2O and CS (NH2) 2.