Comprehensive Characterization of the Electronic Structure of U4+ in Uranium(IV) Phosphate Chloride

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• 作者：Anna Bronova ; Thomas Droß ; Robert Glaum ; Heiko Lueken ; Manfred Speldrich ; Werner Urland
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：July 18, 2016
• 年：2016
• 卷：55
• 期：14
• 页码：6848-6852
• 全文大小：380K
• 年卷期：0
• ISSN：1520-510X

文摘

Emerald-green single crystals of U(PO₄)Cl were grown by chemical vapor transport in a temperature gradient (1000 → 900 °C). The crystal structure of U(PO₄)Cl (Cmcm, Z = 4, a = 5.2289(7) Å, b = 11.709(2) Å, c = 6.9991(8) Å) consists of a three-dimensional network of [PO₄] tetrahedra and bicapped octahedral [U^IVO₆Cl₂] groups. Polarized absorption spectra measured for two perpendicular polarization directions show a large number of well-resolved electronic transitions. These transitions can be fully assigned on the basis of a detailed ligand-field treatment within the framework of the angular overlap model. The magnetic behavior predicted on the basis of the spectroscopic data is in agreement with an f ² system and perfectly matched by the results of temperature-dependent susceptibility measurements.