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Flux Growth of Uranyl Titanates: Rare Examples of TiO4 Tetrahedra and TiO5 Square Bipyramids
- Source :
- The Journal of Physical Chemistry A. 124:9487-9495
- Publication Year :
- 2020
- Publisher :
- American Chemical Society (ACS), 2020.
-
Abstract
- Single crystals of four new uranyl titanates have been grown via the flux growth method using mixed alkali halide fluxes. Na2(UO2)(TiO)O3 and KNa(UO2)(TiO)O3 have analogous layered structures containing titanyl (TiO2+) units coordinated into TiO5 square pyramids. Cs2(UO2)TiO4 crystallizes in the Cs2USiO6 structure type and is a rare example of a structure containing TiO4 tetrahedra. Cs2(UO2)Ti2O6 crystallizes in a new tunnel structure and contains the also rare TiO5 trigonal bipyramids. DFT studies were performed to understand the bonding in the observed titanate polyhedra. Furthermore, the luminescence properties of the compounds are reported, and leaching studies are reported for Cs2(UO2)Ti2O6.
- Subjects :
- 010304 chemical physics
Chemistry
Halide
010402 general chemistry
Alkali metal
Uranyl
01 natural sciences
Titanate
0104 chemical sciences
chemistry.chemical_compound
Crystallography
Polyhedron
0103 physical sciences
Tetrahedron
Leaching (metallurgy)
Physical and Theoretical Chemistry
Luminescence
Subjects
Details
- ISSN :
- 15205215 and 10895639
- Volume :
- 124
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry A
- Accession number :
- edsair.doi...........e77f7c9c9c8f648fb1432c23a74a944d