Discovery of Cs2(UO2)Al2O5 by Molten Flux Methods: A Uranium Aluminate Containing Solely Aluminate Tetrahedra as the Secondary Building Unit | Zendy

Christian A. Juillerat | Zendy; Vancho Kocevski | Zendy; Theodore M. Besmann | Zendy; HansConrad zur Loye | Zendy

Open Access

Discovery of Cs₂(UO₂)Al₂O₅ by Molten Flux Methods: A Uranium Aluminate Containing Solely Aluminate Tetrahedra as the Secondary Building Unit

Author(s) -

Christian A. Juillerat,

Vancho Kocevski,

Theodore M. Besmann,

HansConrad zur Loye

Publication year - 2019

Publication title -

inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 233

eISSN - 1520-510X

pISSN - 0020-1669

DOI - 10.1021/acs.inorgchem.9b00435

Subject(s) - chemistry , aluminate , uranium , tetrahedron , flux (metallurgy) , radiochemistry , inorganic chemistry , crystallography , metallurgy , materials science , organic chemistry , cement

The flux synthesis, solid state synthesis, and characterization of a new aluminate, Cs 2 (UO 2 )Al 2 O 5 , are reported. Cs 2 (UO 2 )Al 2 O 5 crystallizes in the tetragonal space group I4 1 / amd with lattice parameters a = 7.3254(2) and c = 30.9849(7) and is constructed from edge-sharing chains of UO 7 pentagonal bipyramids that are connected to [Al 2 O 5 ] 4- wo-dimensional sheets. The cesium cations, which are heavily disordered, occupy small channels in the a and b directions in the framework structure. The optical properties and ion exchange behaviors are reported along with DFT calculations that support the observed results of the ion exchange experiments.

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