Abstract : AN OVERVIEW IS GIVEN OF RECENT STRUCTURAL STUDIES ON HETEROMETALLIC URANYL-CONTAINING SPECIES, WITH PARTICULAR EMPHASIS ON THOSE FORMED WITH CARBOXYLATE LIGANDS, SHOWING THE EFFECT OF THE ADDITIONAL METAL CATIONS AND ANCILLARY LIGANDS ON THE GEOMETRY AND TOPOLOGY OF THE ASSEMBLIES GENERATED. THESE EXAMPLES ILLUSTRATE THE SOPHISTICATION WHICH IS NOW POSSIBLE IN THE DESIGN AND SYNTHESIS OF BOTH URANYL CLUSTERS AND COORDINATION POLYMERS.
