摘要
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 data were determined for two ternary systerms, i.e., REI3CS(NH2)2H2O(RE=Eu, Yb) at 0 ℃, and the phase diagrams of the systems at 0 ℃ were plotted. It was found that there are new coordination compounds REI3·2CS(NH2)2·10H2O formed in the systems, the new compounds unsymmetrically dissolve in water. Components of new compounds were determined by the phase equilibrium diagrams and chemical analysis. The phase of new compounds were proved by Xray powder diffraction. The structive and thermal statility of new compounds were characterized by infrared analysis, and thermgravimetry and diferential therm analysis. The results show that RE was react with H2O and S of CS(NH2)2, and the thermal stability of new compounds is poor.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2003年第3期267-271,共5页
Journal of the Chinese Society of Rare Earths
基金
内蒙古自然科学基金资助项目(9610E03)
关键词
无机化学
碘化铕
碘化镱
硫脲
相平衡
稀土
inorgamic chemistry
europium iodide
ytterbium iodide
thiourea
phase equilibrium
rare earths