【摘要】 用差热分析和Ｘ射线粉末衍射法研究了ＥｕＩ２－ＲｂＩ二元体系相图。表明该体系是一个有４个化合物（ＲｂＥｕ２Ｉ５，ＲｂＥｕＩ３，Ｒｂ３ＥｕＩ５，Ｒｂ４ＥｕＩ６）生成的复杂低共熔体系，其中ＲｂＥｕ２Ｉ５和ＲｂＥｕＩ３为固液同组成化合物，Ｒｂ３ＥｕＩ５和Ｒｂ４ＥｕＩ６为固液异组成化合物。初步确定Ｒｂ３ＥｕＩ５为立方晶系：ａ＝１．０１２４（１）ｎｍ；Ｒｂ４ＥｕＩ６为四方晶系：ａ＝１．３７１９（５）ｎｍ，ｃ＝０．６４５８（５）ｎｍ。更多还原

【Abstract】 The phase diagram of EuI2-RbI binary system has been studied by DTA and X-ray powder diffraction.It is a complicated eutectic system with four compounds──two congruent melting compounds RbEu2I5 and RbEuI₃ and two incongruent melting compounds Rb3EuI5 and Rb4EuI6.The structure of Rb3EuI5 belongs to a cubic system with a=1.0124（1）nm,and Rb₄EuI₆ belongs to a tetragonal system with a=1.3719 （5）nm,c=0. 6458（5）nm.更多还原