Citation: Gui Qing HUANG, Shi Wei ZHANG, Mei Cheng SHAO. CRYSTAL STRUCTURE OF 18-TUNGSTODIVANADATE ANION IN Na₂H₂[H₂V₂W₁₈O₆₂].12H₂O[J]. Chinese Chemical Letters, ;1993, 4(10): 937-938. shu

CRYSTAL STRUCTURE OF 18-TUNGSTODIVANADATE ANION IN Na₂H₂[H₂V₂W₁₈O₆₂].12H₂O

Institute of Physical Chemistry, Peking University, Beijing 100871

Received Date: 1 March 1993

Fund Project: The project is suported by the Key Laboratory of Molecular Spectroscopy and Structure, National Education Commission of China.

The structure of Na₂H₂[H₂V₂W₁₈O₆₂]12H₂O has been determined by x-ray analysis. The crystals are trigonal, space group R3m, with cell parameters a=37.613 (11), c=12.972 (7) A, V=15901 (13) A³, and Z=9. The structure model was refined by full-matrix least square to R=0.065 for 1702 reflections with F>4σ (F). The existence of the[H₂V₂W₁₈O₆₂]^4- heteropolyanion in the crystals has been confirmed. It is composed of two VO₄ tetrahedra and eighteen WO₆ octahedra linked to give the Dawson-type structure.
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