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本文研究了四元体系MCl-GdCl_3-HCl-H_2O(M=K,Rb,Cs;20℃)在不同酸浓度下的溶度,绘制了相应的溶度图,当M=K,HClwt%=14～23%的平行截面时,体系中无化合物形成;当M=Rb,HClwt%=13%时,体系中无化合物形成,但在HClwt%=22的平行截面时,体系中形成固液异组成的化合物RbCl·GdCl_3·4H_2O(1);当M=Cs,在HClwt%分别为13%和20%的条件下,体系均形成4CsCl·GdCl_3·H_2O(2)和2CsCl·GdCl_3·7H_2O(3)两种化合物.2在两种酸浓度下都是固液异组成的化合物,3随酸浓度由低到高的变化,从固液同组成化合物转变为固液异组成化合物.化合物1,2未见文献报道.本文的研究结果为Meyer的合成反应提供了热力学相平衡基础和新的机理解释,并可以更好地应用和指导Meyer合成反应.同时,首次提出了合成RbGd_2Cl_7、Cs_3Gd_2Cl_9两个化合物的可能性.
In this paper, the solubility of quaternary system MCl-GdCl_3-HCl-H_2O (M = K, Rb, Cs; 20 ℃) at different acid concentrations was studied and the corresponding solubility diagrams were plotted. 14% ~ 23% of the parallel cross-section, no compound was formed in the system. When M = Rb, HClwt% = 13%, no compound was formed in the system, (2) and 2CsCl · GdCl 3 · 7H 2 O (3) were synthesized under the conditions of HCl = 13% and 20%, respectively. ) .2 Compounds that are solid-liquid heterostructures at both acid concentrations, 3 Change from solid-liquid to solid-liquid heterostructures with low to high acid concentrations Compound 1, 2 It has not been reported in the literature.The results of this paper provide a basis for the thermodynamic phase equilibrium and a new mechanism explanation for the synthesis reaction of Meyer and can better apply and guide the Meyer synthesis reaction.At the same time, two compounds RbGd_2Cl_7 and Cs_3Gd_2Cl_9 The possibility of.