1. A new low temperature route to uranyl borates with structural variations.
- Author
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Wu, Shijun, Wang, Shuao, Polinski, Matthew J., Depmeier, Wulf, Albrecht-Schmitt, Thomas E., and Alekseev, Evgeny V.
- Subjects
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BORATES , *HIGH-potassium diet , *ALKALI metals , *POTASSIUM compounds , *ISOTHERMAL processes , *POLYHEDRA - Abstract
Three new uranyl borates, K(UO2)(BO3) (1), Rb(UO2)(BO3) (2) and Cs(UO2)(BO3) (3) have been prepared using B2O3 fluxes at 1000 ºC. 1 and 3 can also be synthesized using potassium tetraborate tetrahydrate as a molten flux at 290 ºC, which provides a new low temperature route to prepare actinide borates. 1 possesses an a-uranophane anion sheet topology identical to that in the previously reported compounds Li(UO2)(BO3) and Na(UO2)(BO3). 2 and 3 display a new [UO5]1∞ anion topology with a basic building block of edge-sharing dimers comprised of (UO7)2 polyhedra. The A(UO2)(BO3) (A ¼ alkali metal) series shows a systematic structural evolution, which will be discussed in the main text. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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