Received 12 May 2011
In the title ammonium polyoxometallate salt, (C6H16N)4[H2V10O28], the anion features O atoms engaged in 6-, 3- and 2-bridging of adjacent VV atoms, confering an octahedral coordination at each of the twenty unique metal atoms. Two anions are linked by 3- and 2-bridged OH units across a center of inversion, forming a dimer which is linked to the cations by N-HO hydrogen bonds. The cation is disordered over two positions in a 0.776 (4):0.224 (4) ratio in one of the two independent ion pairs in the asymmetric unit, and 0.627 (10):0.373 (10) in the other.
Data collection: CrysAlis PRO (Agilent, 2010); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: ZS2113 ).
I thank the University of Malaya for supporting this study.
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