High Structural Complexity of Potassium Uranyl Borates Derived from High-Temperature/High-Pressure Reactions

Link:

https://doi.org/10.1021/ic400016z

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Erscheinungsjahr:

2013

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Text

Beschreibung:

Three new potassium uranyl borates, K12[(UO2) 19(UO4)(B2O5)2(BO 3)6(BO2OH)O10] ·nH 2O (TPKBUO-1), K4[(UO2)5(BO 3)2O4]·H2O (TPKBUO-2), and K15[(UO2)18(BO3)7O 15] (TPKBUO-3), were synthesized under high-temperature/high-pressure conditions. In all three compounds, the U/B ratio exceeds 1. Boron exhibits BO3 coordination only, which is different from other uranyl borates prepared at room temperature or under mild hydrothermal conditions. A rare uranium(VI) tetraoxide core UO4O2, which is coordinated by two BO3 groups, is observed in the structure of TPKBUO-1. Both structures of TPKBUO-1 and TPKBUO-3 contain three different coordination environments of uranium, namely, UO4O2, UO 2O4, and UO2O5 and UO 2O4, UO2O5, and UO2O 6 bipyramids in TPKBUO-1 and TPKBUO-3, respectively. © 2013 American Chemical Society.

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info:eu-repo/semantics/restrictedAccess

Quellsystem:

Forschungsinformationssystem der UHH

Interne Metadaten

Quelldatensatz: oai:www.edit.fis.uni-hamburg.de:publications/b9b694f8-f557-4845-b295-b38df8589055