中华医学超声杂志

应用化学 ›› 1988, Vol. 0 ›› Issue (6): 30-34.

• 研究论文 • 上一篇    下一篇

三氟醋酸钆的晶体结构

张静筠, 张思远, 苗秀琴, 卫革成, 胡宁海, 金钟声   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1987-10-26 修回日期:1988-07-13 出版日期:1988-12-10 发布日期:1988-12-10
  • 基金资助:
    国家自然科学基金

CRYSTAL STRUCTURE OF GADOLINIUM TRIFLUOROACETATE

Zhang Jingjun, Zhang Siyuan, Miao Xiuqin, Wei Gecheng, Hu Ninghai, Jin Zhongsheng   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1987-10-26 Revised:1988-07-13 Published:1988-12-10 Online:1988-12-10

PDF

392

被引次数

7

摘要： 测定了[Gd(CFCOO)3·3H2O]2的晶体结构属单斜晶系,空间群为P21/c.Z=2.晶胞参数a=9.192(3),b=18.890(1),c=9.785(3)Å;β=113.84(2)°.[Eu0.1Gd0.9(CF3COO))3·3H2O]2的光谱构分析表明稀土离子周围的局部对称性可能是C2(Cs)和C2h。

关键词: 钆, 三氟醋酸盐, 晶体结物

Abstract: Crystal of gadolinium trifluoracetate[Gd(CF3COO)3·3H2O]2 prepared at room temperature is monoclinic with space group P21/c. Its lattice parameters: a= 9.192 (3), b=18.890(1), c=9.785(3)Å; β=113.84(2). The structure was refined to R=0.0422. The results show that every two Gd2+ ions are linked in pairs through four O-C-O bridges of CF3COO groups, forming a complex molecule. The Gd3+ is eight-coordinated (3H2O and 5 CF3COO). There are two dimers in every cell lattice, viz Z=2. The Gd—O distances range from 2.35 to 2.47 Å. Analysis of spectral properties of [Eu0.1Gd0.9(CF3COO)3·3H2O]2 shows that Eu3+(or Gd3+) ions occupy two crystallographic sites, viz C2(or Cs) and C2h.

Key words: Gadolinium, Trifluoroacetate, Crystal structure

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