物理化学学报 >> 2005, Vol. 21 >> Issue (11): 1249-1253.doi: 10.3866/PKU.WHXB20051111

研究论文 上一篇    下一篇

NdCl3-CdCl2-HCl-H2O的相平衡及其固相化合物的研究

乔占平; 卓立宏; 郭应臣; 王惠   

  1. 南阳师范学院化学系, 河南 南阳 473061; 西北大学化学系, 陕西省物理无机化学重点实验室, 西安 710069
  • 收稿日期:2005-04-27 修回日期:2005-06-06 发布日期:2005-11-15
  • 通讯作者: 乔占平 E-mail:nyqiaozp@nytc.edu.cn

Phase Equilibrium of the NdCl3-CdCl2-HCl-H2O System at 298.15 K and Characterization of New Compounds

QIAO Zhan-ping; ZHUO Li-hong; GUO Ying-chen; WANG Hui   

  1. Chemistry Department, Nanyang Normal University, Nanyang 473061; Key Laboratory for Physical and Inorganic Chemistry of Shaanxi Province, Department of Chemistry, Northwest University, Xi’an 710069
  • Received:2005-04-27 Revised:2005-06-06 Published:2005-11-15
  • Contact: QIAO Zhan-ping E-mail:nyqiaozp@nytc.edu.cn

摘要: 测定了四元系NdCl3-CdCl2-HCl-H2O(298. 15 K) 的相平衡溶度数据, 绘制了相应的溶度图. 该四元系是由4个固相区CdCl2•H2O(原始盐)、9CdCl2•NdCl3•20H2O、5CdCl2•NdCl3•13H2O、NdCl3•6H2O(原始盐)组成的复杂体系. 用X射线粉末衍射及TG-DTG和荧光光谱对9CdCl2•NdCl3•20H2O 和5CdCl2•NdCl3•13H2O进行了研究. 荧光研究表明, 化合物9CdCl2•NdCl3•20H2O具有微弱的荧光强度, 5CdCl2•NdCl3•13H2O的荧光强度则相对大于9CdCl2•NdCl3•20H2O的. 对X射线粉末衍射进行了指标化.

关键词: 四元体系, 相平衡, CdCl2, NdCl3, 荧光光谱

Abstract: The equilibrium solubility of the quaternary system NdCl3-CdCl2-HCl-H2O was determined at 298.15 K and the corresponding equilibrium diagram was constructed. The result shows that the quaternary system was complicated with four equilibrium solid phases CdCl2•H2O, 9CdCl2•NdCl3•20H2O (9:1 type), 5CdCl2•NdCl3•13H2O (5:1 type) and NdCl3•6H2O. The two new compounds, 9CdCl2•NdCl3•20H2O and 5CdCl2•NdCl3•13H2O, have not yet been reported in literatures, and they were congruently soluble in the quaternary. The two new compounds have been prepared from the system and characterized by XRD, TG-DTG, and fluorescence (FL) spectra. Result of FL spectra showed that the 9CdCl2•NdCl3•20H2O has weak fluorescence intensity, and 5CdCl2•NdCl3•13H2O exhibited larger fluorescence intensity than 9CdCl2•NdCl3•20H2O. X-ray powder diffraction patterns were indexed.

Key words: Quaternary system, Phase equilibrium, Cadmium chloride, Neodymium trichloride, Fluorescence spectra