高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (8): 1296.

• 论文 • 上一篇    下一篇

CsxRb1-xYbI3体系相图、结构及荧光光谱研究

徐敏, 王世华, 王梅天, 刘春生   

  1. 北京师范大学化学系, 北京, 100875
  • 收稿日期:1997-06-13 出版日期:1998-08-24 发布日期:1998-08-24
  • 通讯作者: 徐敏,女,26岁,硕士.
  • 作者简介:徐敏,女,26岁,硕士.
  • 基金资助:

    国家科委"八五"攀登计划和国家自然科学基金(批准号:29471006)资助课题.

Phase Diagram, Structure and Fluorescence Spectra of CsxRb1-xYbI3System

XU Min, WANG Shi-Hua, WANG Mei-Tian, LIU Chun-Sheng   

  1. Department of Chemistry, Beijing Normal University, Beijing, 100875
  • Received:1997-06-13 Online:1998-08-24 Published:1998-08-24

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.

关键词: 低价稀土碘化物, 一步合成法, 相图, 固溶体

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.

Key words: Reduced rare earth iodides, One-step synthesis method, Phase diagram, Solid solution

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