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化学学报
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化学学报 ›› 1989, Vol. 47 ›› Issue (10): 958-961. 上一篇    下一篇

研究论文

K5LnLi2F10(Ln=La, Gd, Y)的合成和Ce^3^+在其中的发光

张吉林;洪广言;李有谟   

  1. 中国科学院长春应用化学研究所
  • 发布日期:1989-10-15

Synthesis of K5LnLi2F10(Ln=La, Gd, Y) and luminescence of Ce^3^+

ZHANG JILIN;HONG GUANGYAN;LI YOUMO   

  • Published:1989-10-15

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在Ar气氛中, 采用高温固相反应法合成了K5LnLi2F10(Ln=La, Ce, Gd, Y)化合物,X射线衍射图表明: 除K5YLi2F10外, 均具有与K5NdLi2F10(KNLF)相同的结构。计算了K5LnLi2F10(Ln=Ln, Ce, Gd)的晶胞参数和晶胞体积, 它们随着La^3^+, Ce^3^+,Gd^3^+的离子半径减小而有规律地减小, 测定了K5CexLn1-xLi2F10化合物的激发光谱和荧光光谱, 发现Ce^3^+的激发波长和发射波长随着La^3^+, Gd^3^+, Y^3^+离子的改变几乎不变, 并对这种现象进行了讨论。

关键词: 镧化合物, 晶体结构, Ｘ射线衍射分析, 晶胞, 光谱分析, 铈化合物, 氟化钾, 铈, 氟化锂, 激光光谱法

The compounds, K5LnLi2F10 (Ln = La, Gd, Y) were synthesized by solid-state reaction in Ar atomsphere Powder x-ray diffraction patterns showed that K5LnLi2F10 is isostructural with K5NdLi2F10 (KNLF) except K5 YLi2F10. The cell parameters and vols. of K5LnLi2F10 (Ln = La, Ce, Gd) were calculated They decrease regularly with radii of La3+, Ce3+ and Gd3+. The excitation and fluorescent spectra of K5CexLn1-xLi2Fe10 were determine The excitation and emission wavelength of Ce3+ is really independent of Ln3+. This phenomenon is discussed.

Key words: LANTHANUM COMPOUNDS, CRYSTAL STRUCTURE, X-RAY DIFFRACTION ANALYSIS, UNIT CELL, SPECTROGRAPHIC ANALYSIS, CERIUM COMPOUNDS, POTASSIUM FLUORIDE, CERIUM, LITHIUM FLUORIDE, LASER SPECTROMETRY

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