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化学学报
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化学学报 ›› 1991, Vol. 49 ›› Issue (4): 335-339. 上一篇    下一篇

研究论文

Ca-Sr-Cu-O系中若干化合物的组成和结构的研究

任玉芳;曾左韬;孟健   

  1. 中国科学院长春应用化学研究所.长春(130022)
  • 发布日期:1991-04-15

The compositions and structures of some compounds in the system Ca- Sr-Cu-O

Ren Yufang;Zeng Zuotao;Meng Jian   

  1. Changchun Inst Appl Chem., CAS.Changchun(130022)
  • Published:1991-04-15

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研究了Ca-Sr-Cu-O三元金属复合氧化物体系,发现了两个新化合物Sr~3Cu~5O~8~+~x和CaSrCu~3.O~5~+~x,两者都属正交晶系,前者a=3.950,b=11.479,c=13.420︿。后者a=6.489,b=11.280,c=12.240︿。文中给出了这两个化合物和SrCuO~2、Sr~2CuO~3的XRD谱。用碘量法测定了化合物中的氧含量。此外还发现了结构与SrCuO~2相似的固溶体Sr~0~.~5Ca~0~.~5CuO~2,也测定了它的XRD谱。

关键词: 组成, 正交晶系, 金属复合氧化物, 三元, 结构, 钙, 铜, 锶

The system of Ca-Sr-Cu-O have been investigated. Two new compounds with compositions Sr~3Cu~5O~8~+~x and CuSrCu~3O~5~+~x have been discovered. Both are orthorhombic with a=3.950, b=11.479, c=13.420︿ for CaSrCu~3O~5~+~x and a=6.489, b=11.280, c=12.240︿ for Sr~3Cu~5O~8~+~x. The X-ray powder data for CaSrCu~3O~5~+~x, Sr~3Cu~5O~8~+~x, Sr~2CuO~3 and SrCuO~2 are presented. The oxidation state of Cu ion and oxygen contents are analyzied by iodometric titration. Sr~0~.~5Ca~0~.~5CuO~2 that has a similar structure with SrCuO~2 has been found and its X-ray data are presented also.

Key words: COMPOSITION, RHOMBIC SYSTEM, STRUCTURE, CALCIUM, COPPER, STRONTIUM

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