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Your search keyword '"Krivovichev, Sergey V."' showing total 1 results
Start Over Author "Krivovichev, Sergey V." Topic chemical structure Topic chemical synthesis Journal journal of solid state chemistry

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1 results on '"Krivovichev, Sergey V."'

1. Syntheses and crystal structures of two novel alkaline uranyl chromates A 2(UO2)(CrO4)2 (A=Rb, Cs) with bidentate coordination mode of uranyl ions by chromate anions

Author

Siidra, Oleg I., Nazarchuk, Evgeny V., and Krivovichev, Sergey V.

Subjects
*URANYL compounds, *CHEMICAL synthesis, *CRYSTAL structure, *ALKALI metals, *CHEMICAL structure, *CATIONS
Abstract

Abstract: Single crystals of Cs2(UO2)(CrO4)2 and Rb2(UO2)(CrO4)2 were prepared by solid state reactions. The structures are based upon the [(UO2)(CrO4)2]2− chains. Within the chains, UrO5 pentagonal bipyramids (Ur=uranyl) form Ur 2O8 dimers, which are linked via CrO4 tetrahedra into one-dimensional chains. The CrO4 tetrahedra coordinate uranyl ions in both mono- and bidentate fashion, which is unusual for uranyl chromates. The bidentate coordination has a strong influence upon geometrical parameters of both U and Cr coordination polyhedra. The conformation of the chains in 1 and 2 is different due to the different size of the Cs+ and Rb+ cations. [Copyright &y& Elsevier]

Published
2012
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