(IUCr) Crystallography Journals Online

Acta Cryst. (2006). E62, i99-i102 [ doi:10.1107/S1600536806008397 ]

Reinvestigation of cadmium diphosphate

W. Bouchelaghem, M. R. Benloucif, M. Mayoufi, A. Benmoussa and K. J. Schenk

Abstract: The crystal structure of the title compound, Cd₂P₂O₇, has been reinvestigated by means of an image-plate diffraction system. The study confirms the previously determined structure [Calvo & Au (1969). Can. J. Chem. 47, 3409-3417], but provides a less biased model and higher precision. The structure consists of alternating layers of isolated P₂O₇ groups and edge-sharing CdO₆ octahedra forming corrugated chains along [1 $\\overline{1}$ 0]. The layers and the parallel chains interconnect by means of corner-sharing. This room-temperature structure is actually the average of a modulated structure, which might partly rectify the unusual bond valences.

Online 22 March 2006