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

Juillerat, Christian A.; Kocevski, Vancho; Besmann, Theodore M.; zur Loye, Hans-Conrad

doi:10.1021/acs.inorgchem.9b00435

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

Journal Article · Tue Mar 12 00:00:00 EDT 2019 · Inorganic Chemistry

DOI:https://doi.org/10.1021/acs.inorgchem.9b00435· OSTI ID:1566508

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Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemistry and Biochemistry, and Center for Hierarchical Wasteform Materials (CHWM)
Univ. of South Carolina, Columbia, SC (United States). Center for Hierarchical Wasteform Materials (CHWM), and Nuclear Engineering Program

The flux synthesis, solid state synthesis, and characterization of a new aluminate, Cs₂(UO₂)Al₂O₅, are reported. Cs₂(UO₂)Al₂O₅ crystallizes in the tetragonal space group $$I_{4_1}$$/amd with lattice parameters $$a$$ = 7.3254(2) and c = 30.9849(7) and is constructed from edge-sharing chains of UO₇ pentagonal bipyramids that are connected to [Al₂O₅]^4– two-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.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Hierarchical Waste Form Materials (CHWM); Univ. of South Carolina, Columbia, SC (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0016574

OSTI ID:: 1566508

Journal Information:: Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 7 Vol. 58; ISSN 0020-1669

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (1)

Targeted crystal growth of uranium gallophosphates via the systematic exploration of the UF ₄ –GaPO ₄ –ACl (A = Cs, Rb) phase space Juillerat, Christian A.; Klepov, Vladislav V.; Smith, Mark D. CrystEngComm, Vol. 22, Issue 17 https://doi.org/10.1039/d0ce00343c	journal	January 2020

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
materials and chemistry by design
nuclear
synthesis (novel materials)
synthesis (predictive)