No abstract

The compound [Eu 5 (C 2 H 4 O 2 ) 6 (CH 3 CO 2 ) 3 ] n was synthesized by dissolving acetate europium salt in ethylene glycol solvent and heating under reflux for a short time. Its structure was solved ab initio from synchrotron powder diffraction data using optimization methods in direct space. The compound has a very large unit-cell volume of 23679 Å 3 and the highest centred cubic symmetry space group, Ia 3 3d (No. 230). The porous metal-organic framework structure is similar to those usually observed in zeolites, with pores volumes of 82 Å 3 , which is of potential interest for gas storage.