M2VOP2O7 (M = Rb, Cs): Two vanadyl pyrophosphates with a layer structure

K. H. Lii, S. L. Wang

研究成果: 雜誌貢獻期刊論文同行評審

65 引文 斯高帕斯(Scopus)

摘要

The new compounds Rb2VOP2O7 and Cs2VOP2O7 were prepared by heating stoichiometric mixtures of Rb3VO4 (or Cs3VO4), VO2, V, and P2O5 in sealed quartz tubes. For Rb2VOP2O7, orthorhombic, P212121, a = 7.101(1), b = 9.174(2), c = 12.801(4) Å, V = 834.0(4)° Å3, Z = 4, and R = 5.56%, Rw = 5.88% for 928 independent reflections. For Cs2VOP2O7, orthorhombic, Pnma, a = 13.280(3), b = 7.247(2), c = 9.518(2) Å, V = 916.0(4) Å3, Z = 4, and R = 4.12%, Rw = 4.53% for 1118 independent reflections. Both structures consist of corrugated layers of vanadyl pyrophosphate with the alkali metal cations between the layers. Each layer is built up from corner-sharing VO5 square pyramids and P2O7 groups. These two compounds adopt a markedly different structure from K2VOP2O7.

原文???core.languages.en_GB???
頁(從 - 到)239-246
頁數8
期刊Journal of Solid State Chemistry
82
發行號2
DOIs
出版狀態已出版 - 10月 1989

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