Received 15 March 2013
Co5V2(P2O7)4 was crystallized by chemical vapour transport using HCl as transport agent. Its crystal structure is isotypic to that of FeII5FeIII2(P2O7)4 and can be regarded as a member of the thortveitite structure family with corrugated layers of metal-oxygen polyhedra extending parallel to (010). Significant occupational disorder between cobalt(II) and vanadium(III) is observed. Four of the five cation sites are occupied by both cobalt and vanadium. The fifth cation site (Co1) is occupied by cobalt only. Sites Co1, M3 and M4 are located on twofold axes. Sites Co1, M2, M3 and M4 show octahedral coordination by oxygen; M5 has a square-pyramidal environment.
For related structures, see: Cruickshank et al. (1962); Gossner & Mussgnug (1929); Krishnamachari & Calvo (1972); Litterscheid (2009); Malaman et al. (1992); Palkina et al. (1985); Stefanidis & Nord (1984); Zachariasen (1930). For the preparation, see: Binnewies et al. (2012); Litterscheid (2009).
Data collection: X-AREA (Stoe & Cie, 2002); cell refinement: X-AREA; data reduction: X-RED (Stoe & Cie, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2008); software used to prepare material for publication: WinGX (Farrugia, 2012).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BR2223 ).
We thank Dr G. Schnakenburg (University of Bonn) for the data collection.
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