Chinese Journal of Applied Chemistry ›› 1991, Vol. 0 ›› Issue (5): 42-48.

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CRYSTAL STRUCTURE OF K4H[SiMo11VO40]·18H2O(1) AND K4H2[PMo9V3O40]·18H2O(2)

Jin Zhongsheng1, Wei Gecheng1, Piao Jinzhi2, Shan Yongkui3   

  1. 1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;
    2. Department of Chemistry, Yan Bian University, Jilin Yanlbian;
    3. Department of Chemistry, Harbin Normal University, Harbin
  • Received:1990-04-04 Revised:1990-07-03 Published:1991-10-10 Online:1991-10-10

Abstract: The crystal structures of the title compounds were determined by single crystal X-raydiffractometry at - 90℃。The complexes crystallize in tetragonal space groups P421c[P4/ mnc] with Z = 2[2].Lattice parameters are a = 12.540(2) [12.515(3)], c = 17.565(5) [17.636(7)]Å, V = 2762 (1) [2762 (2)]Åε.The structures were solved by direct methods and Fouriertechniques and refined by least-squares techniques to R = 0.059[0.057] for 1672[788] reflec-tions.Si in compound (1) is 4-coordinated, Si-O = 1.58Å.M(M = Mo, V) is 6-coordinated,M-O = 1.64 - 2.37Å.K is 7-coordinated, K-O = 2.80—3.11Å.In compound (2), PO4 isdisordered, P-O = 1.51Å, M-O = 1.63—2.47Å, K is 7-coordinate, K—O = 2.85~3.10Å.Bothstructures are in network.

Key words: heteropolyacid, crystal structure