摘要
测定了三元系CeCl3-CdCl2-H2O(25℃)和四元系CeCl3-CdCl2-HCl(～8.4%)-H2O(25℃)的相平衡溶度数据,绘制了相应的溶度图.该三元系是由5个固相区CdCl2·2.5H2O(原始盐)、CdCl2·H2O(原始盐)、6CdCl2·CeCl3·14H2O、4CdCl2·CeCl3·12H2O、CeCl3·7H2O(原始盐)组成的复杂体系.该四元系是由5个固相区CdCl2·H2O(原始盐)、9CdCl2·CeCl3·19H2O、6CdCl2·CeCl3·14H2O、4CdCl2·CeCl3·12H2O、CeCl3·7H2O(原始盐)组成的复杂体系.其中6CdCl2·CeCl3·14H2O在该三元系是介稳化合物.9CdCl2·CeCl3·19H2O、6CdCl2·CeCl3·14H2O和4CdCl2·CeCl3·12H2O用X射线粉末衍射及TG-DTG和DSC等方法进行了研究,并对X射线粉末衍射进行了指标化.
The solubilities of the ternary CeCl3-CdCl2-H2O system and the quaternary CeCl3-CdCl2-HCl-H2O system were determined at 25 degreesC, and the corresponding equilibrium diagrams were constructed. The results show that the ternary system was complicated with five equilibrim solid phases, and they are CdCl2 . 2. 5H(2)O, CdCl2 . H2O, 6CdCl(2) . CeCl3 . 14H(2)O (6: 1 type), 4CdCl(2) . CeCl3 . 12H(2)O(4: 1 type) and CeCl3 . 7H(2)O. The quaternary system was also complicated with five equilibrium solid phases, that is, CdCl2 . H2O, 9CdCl(2) . CeCh . 19H(2)O (9: 1 type), 6CdCl(2) . CeCl3 . 14H(2)O (6: 1 type), 4CdCl(2) . CeCl3 . 12H(2)O (4: 1 type) and CeCl3 . 7H(2)O. Three new compounds, 9CdCl(2) . CeCl3 . 19H(2)O, 6CdCl(2) . CeCl3 . 14H(2)O, and 4CdCl(2) . CeCl3 . 12H(2)O have not yet been reported in literatures, and they were congruently soluble in the quaternary. 6CdCl(2) . CeCl3 . 14H(2)O was a kind of metastable compound in the ternary system, and it was changed into 4CdCl(2) . CeCl3 . 12H(2)O with time. Both 6: 1 type and 4: 1 type were non-congruently soluble compounds in the ternary system. The three new compounds have been prepared and have been characterized by XRD, TC-DTG, and DSC. X-ray powder diffraction patterns are indicated.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2005年第2期128-133,共6页
Acta Physico-Chimica Sinica
基金
河南省自然科学基金(0311021900)资助项目~~
关键词
三元体系
四元体系
相平衡
CDCL2
CECL3
ternary system
quaternary system
phase equilibrium
cadmium chloride
cerium chloride
