title: Uranyl peroxide closed clusters containing topological squares.
abstract: Four self-assembling clusters of uranyl peroxide polyhedra have been formed in alkaline aqueous solutions and structurally characterized. These clusters consist of 28, 30, 36 and 44 uranyl polyhedra and exhibit complex new topologies. Each has a structure that contains topological squares, pentagons and hexagons. Analysis of possible topologies within boundary constraints indicates a tendency for adoption of higher symmetry topologies in these cases. Small angle X-ray scattering data demonstrated that crystals of one of these clusters can be dissolved in ultrapure water and that the clusters remain intact for at least several days.
authors.affiliation: Department of Civil Engineering and Geological Sciences, University of Notre Dame, Notre Dame, Indiana 46556, USA.
authors.forename: Daniel K
authors.initials: DK
authors.lastname: Unruh
authors.forename: Alicia
authors.initials: A
authors.lastname: Burtner
authors.forename: Laura
authors.initials: L
authors.lastname: Pressprich
authors.forename: Ginger E
authors.initials: GE
authors.lastname: Sigmon
authors.forename: Peter C
authors.initials: PC
authors.lastname: Burns