高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (11): 1592.

• 论文 • 上一篇    下一篇

新型混价稀土氟化物KEu(Ⅱ)Ce(Ⅲ)F6

贯军, 汤中佳, 吴国庆   

  1. 北京师范大学化学系, 北京, 100875
  • 收稿日期:1993-12-04 修回日期:1994-07-28 出版日期:1994-11-24 发布日期:1994-11-24
  • 通讯作者: 吴国庆.
  • 作者简介:贯军,女,26岁,硕士.

Novel Mixing Oxidation State Rare Earth Fluoride KEuCeF6

GUAN Jun, TANG Zhong-Jia, WU Guo-Qing   

  1. Department of Chemistry, Beijing Nomal university, Beijing, 100875
  • Received:1993-12-04 Revised:1994-07-28 Online:1994-11-24 Published:1994-11-24

PDF (PC)

摘要： 用碱金属热还原法合成了含有混价稀土的新型氟化物KEuCeF6,用组成分析、X射线衍射、光电子能谱和荧光光谱对新化合物的组成、结构和稀土离子的氧化态进行了表征。KEuCeF6的晶体属gagarinite(钠钙钇氟石)和UCl3结构的相关型。空间群P3 ,a=645.4(2)pm,c=373.0(1)pm,c/α=0.578,Z=1;其中的铕和铈的氧化态分别为+2和+3.

关键词: 稀土, 铕(Ⅱ), 氟化物, 晶体结构, 钠钙钇氟石

Abstract: Novel mixed oxidation state rare earth fluoride KEuCeF6 was synthesized by reducing tysonite structure type mixed rare earth trifluoride with metallic potassium vapor.The new compound was characterized by chemical analysis. X-ray powder diffraction, XPSand fluorescence spectra.The new compound has a stuffed structure of UCl3, related to NaNdF4 and gagarinite.Crystal system:Trigonal;space group: P3 ;Bravais lattice type hPwith lattice parameters a=645.4(2)pm, c=373. 0(1)pm, c/a=0.578. V=134. 65(12)×106pm6, Z=1, Dx=5.49g·cm-3, Dpyc=5.42g·cm-3.

Key words: Rare earth, Europium, Fluoride, Crystal structure.Gagarinite

TrendMD: