| CsCl-TmCl3-HCl-H2O(25 ℃)的相平衡及其固相化合物 |
| CsCl-TmCl3-HCl-H2O System at 25 ℃: Phase Equilibrium and New Solid Phase Compound |
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| 摘要: |
| 关键词: 四元体系 相平衡 氯化铯 氯化铥 溶解焓 |
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| Abstract: The equilibrium solubilities of the quaternary system CsCl-TmCl3-HCl-H2O was determined at 25 ℃ and the corresponding equilibrium diagram was constructed. The diagram is a complicated system with limited solid solutions and formation of a new compound 3CsCl·2TmCl3·14H2O. The new compound has been characterized by XRD, TC-DTG and fluorescence spectrometry. Results show that upconversion spectrum exhibits at 335 nm when exciting at 860 nm, and fluorescence spectrum exhibits at 295 nm and 385 nm when exciting at 240 nm. The compound loses its crystal water by four steps at 50 to 250 ℃. Using a heat conduction calorimeter, the standard molar enthalpy of dissolution of 3CsCl·2TmCl3·14H2O was determined to be (-11.601 ± 0.050) kJ·mol-1 at 298.15 K. |
| Keywords: quaternary system phase equilibrium cesium chloride thulium chloride enthalpy of dissolution |
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| 乔占平,卓立宏,张书申,王惠.CsCl-TmCl3-HCl-H2O(25 ℃)的相平衡及其固相化合物[J].无机化学学报,2006,22(8):1545-1549. |
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