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Issue 2, 2003
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Hydrothermal synthesis and structures of the new open-framework uranyl silicates Rb4(UO2)2(Si8O20) (USH-2Rb), Rb2(UO2)(Si2O6)·H2O (USH-4Rb) and A2(UO2)(Si2O6)·0.5H2O (USH-5A; A = Rb, Cs)

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Abstract

Four new open-framework alkali metal uranyl silicates, Rb4(UO2)2(Si8O20) (USH-2Rb), Rb2(UO2)(Si2O6)·H2O (USH-4Rb), and A2(UO2)(Si2O6)·0.5H2O (USH-5A; A = Rb, Cs), have been prepared hydrothermally at 245 °C. The structures of USH-2, -4, and -5 contain UO6 tetragonal bipyramidal units connected by double chains, 4-membered rings, and single chains of SiO4 tetrahedra, respectively. The compounds have been characterized by single crystal X-ray diffraction, scanning electron microscopy, UV-vis and infrared spectroscopy, and thermogravimetric analysis.

Graphical abstract: Hydrothermal synthesis and structures of the new open-framework uranyl silicates Rb4(UO2)2(Si8O20) (USH-2Rb), Rb2(UO2)(Si2O6)·H2O (USH-4Rb) and A2(UO2)(Si2O6)·0.5H2O (USH-5A; A = Rb, Cs)

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Supplementary files

Article information


Submitted
09 Sep 2002
Accepted
12 Nov 2002
First published
16 Dec 2002

J. Mater. Chem., 2003,13, 191-196
Article type
Paper

Hydrothermal synthesis and structures of the new open-framework uranyl silicates Rb4(UO2)2(Si8O20) (USH-2Rb), Rb2(UO2)(Si2O6)·H2O (USH-4Rb) and A2(UO2)(Si2O6)·0.5H2O (USH-5A; A = Rb, Cs)

J. Huang, X. Wang and A. J. Jacobson, J. Mater. Chem., 2003, 13, 191
DOI: 10.1039/B208787C

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