Acta Cryst. (2009). E65, i3  [ doi:10.1107/S1600536808042384 ]

Dicaesium magnesium bis(dihydrogen phosphate(V)) dihydrate

R. Essehli, B. El Bali, M. Lachkar and M. Bolte

Abstract: The title compound, Cs₂Mg(H₂P₂O₇)₂·2H₂O, is isostructural with the related known isoformular phosphates. The crystal framework consists of corner-sharing MgO₆ and H₂P₂O₇ polyhedra, leading to tunnels parallel to the b-axis direction in which Cs⁺ ions are located. The H₂P₂O₇ unit shows a bent eclipsed conformation. The Mg²⁺ ion lies on an inversion center. The water molecules form hydrogen bonds to O atoms of two different dihydrogenphosphate ions, which are further hydrogen bonded to symmetry-equivalent dihydrogenphosphate ions.

Online 17 December 2008

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