The structure of Ba3W2O9; an example of face-shared octahedra with tungsten (VI)

Kenneth R Poeppelmeier, A. J. Jacobson, J. M. Longo

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


The structure of Ba3W2O9 has been determined from powder x-ray diffraction data and found to be the same as in Cs3Tl2Cl9. Two-thirds of the octahedral sites between hexagonal closest-packed BaO3 layers (ABAB...) are filled by the tungsten atoms. The enneaoxo W2O9 6- group represents the first crystal chemistry example of tungsten (VI) in a face-sharing arrangement. Infrared and Raman data are consistent with overall 32 (D3) site symmetry. Crystallographic and spectroscopic evidence supports a covalent bonding model with oxygen pπ → metal dπ stabilization of this tungsten (VI) phase.

Original languageEnglish
Pages (from-to)339-345
Number of pages7
JournalMaterials Research Bulletin
Issue number3
Publication statusPublished - 1980

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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