| AVS 58th Annual International Symposium and Exhibition | |
| Actinides and Rare Earths Focus Topic | Thursday Sessions |
| Session AC+TF-ThA |
| Session: | The Structure, Properties and Chemistry of Thin Films of Actinides and Rare Earths |
| Presenter: | Jessica Morrison, University of Notre Dame |
| Authors: | J.M. Morrison, University of Notre Dame P.C. Burns, University of Notre Dame |
| Correspondent: | Click to Email |
The crystal structure determinations of four highly complex U(VI) germanate framework compounds reveal three distinct U(VI) sites—two that are coordinated by five equatorial oxygen atoms each to form pentagonal bipyramids and one that is coordinated by six oxygen atoms to form a distorted octahedron without the uranyl ion [1]. This is uncommon as most inorganic U(VI) compounds contain the uranyl ion, (UO2)2+. Also present are cation-cation interactions which occur when an oxygen atom of the uranyl ion also acts as an equatorial oxygen atom in a neighboring U(VI) polyhedron. CCIs are present in fewer than 2% of U(VI) compounds. Finally, a disordered system with the possibility of a one-dimensional GeO5 chain has led us to suggest three structural models with regard to Ge coordination. The interesting structural and chemical complexities of these CCI-bearing compounds will be presented along with a discussion of the densities of CCI-bearing U(VI) compounds.
[1] Morrison, J.M.; Moore-Shay, L. J.; Burns, P.C. Inorg. Chem. 2011, 50, 2272-2277.