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Citation: QIAO Zhan-ping, ZHUO Li-hong, GUO Ying-chen, WANG Hui. Phase Equilibrium of the NdCl₃-CdCl₂-HCl-H₂O System at 298.15 K and Characterization of New Compounds[J]. Acta Physico-Chimica Sinica, ;2005, 21(11): 1249-1253. doi: 10.3866/PKU.WHXB20051111 shu

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

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 Date: 27 April 2005
Available Online: 15 November 2005

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.
- Quaternary system;Phase equilibrium;Cadmium chloride;Neodymium trichloride;Fluorescence spectra
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Phase Equilibrium of the NdCl3-CdCl2-HCl-H2O System at 298.15 K and Characterization of New Compounds

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