Cs(2)USi(6)O(15): A Tetravalent Uranium Silicate

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50865

Title:	Cs(2)USi(6)O(15): A Tetravalent Uranium Silicate
Authors:	Liu,HK;Lii,KH
Contributors:	化學學系
Keywords:	CRYSTAL-CHEMISTRY;PENTAVALENT-URANIUM;XPS SPECTRA;GERMANATES;MINERALS;CS;RB
Date:	2011
Issue Date:	2012-03-27 18:11:38 (UTC+8)
Publisher:	國立中央大學
Abstract:	A uranium(IV) silicate has been synthesized under high-temperature, high-pressure hydrothermal conditions. The structure consists of unbranched dreier single layers with the composition [Si(2)O(5)] that are connected by UO(6) octahedra to form a 3D framework with 7-ring channels where the Cs(+) cations are located. Each UO(6) octahedron spans four neighboring dreier single chains and, therefore, introduces a high degree of corrugation in the silicate layers. The U 4f X-ray photoelectron spectroscopy spectrum was measured to confirm the valence state of the uranium. A comparison of related metal silicate structures is made. After the synthesis of this compound, all members in the family of uranium silicates and germanates with oxidation states of uranium from 4+ to 6+ have been observed.
Relation:	INORGANIC CHEMISTRY
Appears in Collections:	[Department of Chemistry] journal & Dissertation

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