Hydrothermal syntheses and structures of three-dimensional oxo-fluorovanadium phosphates: [H2N(C2H4)2NH2] 0.5[(VO)4V(HPO4)2(PO 4)2F2(H2O)4] · 2H2O

Grant Bonavia, R. C. Haushalter, Jon A Zubieta

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Abstract

The hydrothermal reactions of FPO3H2 with vanadium oxides result in the incorporation of fluoride into V-P-O frameworks as a consequence of metal-mediated hydrolysis of the fluorophosphoric acid to produce F- and PO3- 4. By exploiting this convenient source of F-, two 3-dimensional oxo-fluorovanadium phosphate phases were isolated, [H2N(C2H4)2NH2] 0.5 [(VO)4V(HOP4)2(PO4) 2F2(H2O)4) · 2H2O (1 · 2H2O) and K2[(VO)3 (PO4)2F2(H2O)] · H2O (2 · H2O). Both anionic frameworks contain (VIVO)-F--phosphate layers, with confacial bioctahedral {(VIVO)2FO6} units as the fundamental motif. In the case of 1, the layers are linked through {VIIIO6} octahedra, while for 2 the interlayer connectivity is provided by edge-sharing {(VIVO)2 F2O6} units. Crystal data are 1 · 2H2O, CH10FN0.5O13P2V2.5, mono-clinic C2/m, a = 18.425(4) Å, c = 8.954(2) Å, β = 93.69(2)0, V = 1221.1(4) Å3, Z = 4, Dcalc = 2.423 g cm-3; 2 · H2O, H4F2K2O13P2V3, triclinic P1̄, a = 7.298(1) Å, b = 8.929(2) Å, c = 10.090(2) Å, α = 104.50(2)0, β = 100.39(2)0, δ = 92.13(2)0, V = 623.8(3) Å3, Z = 2, Dcalc = 2.891 gcm-3.

Original languageEnglish (US)
Pages (from-to)292-299
Number of pages8
JournalJournal of Solid State Chemistry
Volume126
Issue number2
DOIs
StatePublished - Nov 1 1996

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ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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