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UF3(H2O)(C2O4)0.5:  A Fluorooxalate of Tetravalent Uranium with a Three-Dimensional Framework Structure

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journal contribution
posted on 20.02.2006, 00:00 by Chih-Min Wang, Chia-Hsien Liao, Pei-Lin Chen, Kwang-Hwa Lii
A new uranium(IV) fluorooxalate, UF3(H2O)(C2O4)0.5, has been synthesized by a hydrothermal method and structurally characterized by single-crystal X-ray diffraction, infrared spectroscopy, and thermogravimetric analysis. The structure consists of two-dimensional layers of corner- and edge-sharing tricapped trigonal prisms with the composition UF4/2F2/2O3 linked by bisbidentate oxalate ligands to form a three-dimensional framework. Magnetic susceptibilities were measured to confirm the tetravalent state of uranium. Crystal data:  monoclinic, space group C2/c, a = 17.246(3) Å, b = 6.088(1) Å, c = 8.589(2) Å, β = 95.43(3)°, and Z = 8.