| CsxRb1-xYbI3体系相图、结构及荧光光谱研究 |
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| 引用本文： | 徐敏,王世华,王梅天,刘春生.CsxRb1-xYbI3体系相图、结构及荧光光谱研究[J].高等学校化学学报,1998,19(8):1296-1299. |
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| 作者姓名： | 徐敏 王世华 王梅天 刘春生 |
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| 作者单位： | 北京师范大学化学系, 北京, 100875 |
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| 基金项目： | 科技部"攀登计划",国家自然科学基金,,29471006,, |
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| 摘 要： | 用一步合成法对CsxRb1-xYbI3体系进行了全组成范围内的合成,采用差热分析和X射线粉末相分析法制作了相图,用体系的荧光光谱进一步验证了相图的可靠性.该体系形成一个既有包晶反应又有类低共熔反应的有限固溶体,包晶反应温度和类低共熔反应温度分别为627℃和371℃.相分析确定了RbYbI3高温相及三类固溶体的结构:0≤x≤0.5形成以RbYbI3为基的NH4CdCl3型固溶体和以RbYbI3高温相为基的CaIrO3型固溶体,0.75≤x≤1.0形成以CsYbI3为基的GdFeO3型固溶体.
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| 关 键 词： | 低价稀土碘化物 一步合成法 相图 固溶体 |
| 收稿时间： | 1997-06-13 |
| 修稿时间： | 1997年6月13日 |
Phase Diagram, Structure and Fluorescence Spectra of CsxRb1-xYbI3 System |
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| XU Min,WANG Shi-Hua,WANG Mei-Tian,LIU Chun-Sheng.Phase Diagram, Structure and Fluorescence Spectra of CsxRb1-xYbI3 System[J].Chemical Research In Chinese Universities,1998,19(8):1296-1299. |
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| Authors: | XU Min WANG Shi-Hua WANG Mei-Tian LIU Chun-Sheng |
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| Institution: | Department of Chemistry, Beijing Normal University, Beijing, 100875 |
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| Abstract: | The CsxRb1-xYbI3system in the composition 0≤ x ≤1 was synthesized and the phase diagram of CsxRb1-xYbI3was measured by the different thermal analyses(DTA). This phase diagram was completed and certified by the X-ray powder diffraction and flourescent spectra. This system is a limited solid solution with peritectic reaction and eutectoid reaction. The temperature of peritectic point and eutectoid point are 627 ℃ and 371 ℃ respectively. There are three kinds of solid solution in the system: a RbYbI 3 type solid solution and a high temperature phase of RbYbI3type solid solution when 0≤ x ≤0.5 and a CsYbI3type solid solution when0.75≤ x ≤1.0. |
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| Keywords: | Reduced rare earth iodides One step synthesis method Phase diagram Solid solution |
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