A new structure type of phosphate: Crystal structure of Na2Zn5(PO4)4

L. N. Ji, H. W. Ma*, J. B. Li, J. K. Liang, B. J. Sun, Y. H. Liu, J. Y. Zhang, G. H. Rao

*Corresponding author for this work

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Abstract

A new compound, Na2Zn5(PO4)4, was identified in the system ZnO{single bond}Na2O{single bond}P2O5 and high-quality crystal was obtained by the melt method. The crystal structure of this compound was solved by direct method from single crystal X-ray diffraction data. The structure was then refined anisotropically using a full-matrix least square refinement on F2 and the refinement converged to R1=0.0233 and wR2=0.0544. This compound crystallizes in the orthorhombic system with space group Pbcn, lattice parameters a=10.381(2) Å, b=8.507(1) Å, c=16.568(3) Å and Z=4. The structure is made up of 3D [Zn5P4O16]n2n- covalent framework consisting of [Zn4P4O16]n4n- layers. The powder diffraction pattern of Na9Zn21(PO4)17 is explained by simulating a theoretical pattern with NaZnPO4 and Na2Zn5(PO4)4 in the molar ratio of 1:4 and then by Rietveld refinement of experimental pattern. Na2Zn5(PO4)4 melts congruently at 855 °C and its conductivity is 5.63×10-9 S/cm.

Original languageEnglish
Pages (from-to)2256-2261
Number of pages6
JournalJournal of Solid State Chemistry
Volume180
Issue number8
DOIs
Publication statusPublished - Aug 2007
Externally publishedYes

Keywords

  • NaZn(PO)
  • Single-crystal diffraction
  • Structure determination
  • X-ray powder diffraction

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Ji, L. N., Ma, H. W., Li, J. B., Liang, J. K., Sun, B. J., Liu, Y. H., Zhang, J. Y., & Rao, G. H. (2007). A new structure type of phosphate: Crystal structure of Na2Zn5(PO4)4. Journal of Solid State Chemistry, 180(8), 2256-2261. https://doi.org/10.1016/j.jssc.2007.05.027