Two tetravalent uranium silicate and germanate crystals with three membered single-ring by molten salt method: K2USi3O9 and Cs2UGe3O9

• Published in: Chinese chemical letters Vol. 33; no. 7; pp. 3527 - 3530
• Main Authors: Zhang, Xu, Zhang, Lei, Bo, Tao, Huang, Shanen, Huang, Zhiwei, Shi, Weiqun
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-07-2022; Engineering Laboratory of Advanced Energy Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China; School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China%Laboratory of Nuclear Energy Chemistry,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China; College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China%Engineering Laboratory of Advanced Energy Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China%Engineering Laboratory of Advanced Energy Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China
• Subjects: Framework; Molten salt method; Single crystal; Uranium germanate; Uranium silicate; Molten salt method; Uranium germanate; Uranium silicate; Framework; Single crystal
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2022.03.026

Two tetravalent uranium silicate and germanate M2UIVT3O9 (M = K, Cs; T = Si, Ge) crystals were crystalized under inert gas by molten salt flux growth method. K2USi3O9 (1) crystallizes in the monoclinic space group P121/n1 with lattice parameters a = 7.1076 Å, b = 10.4776 Å, c = 12.2957 Å, γ = 120° and V = 915.67 Å3. Cs2UGe3O9 (2) crystallizes in a hexagonal space group P-6 with lattice constants of a = 7.5138 Å, b = 7.5138 Å, c = 11.0114 Å, γ = 120° and V = 538.38 Å3. Bond valence calculations indicate tetravalent uranium in both structures, which contain three-membered single-ring T3O96− trimers. K2USi3O9 is the first uranium silicate that contains the Si3O96− trimers.
Two tetravalent uranium silicate and germanate M2UIVT3O9 (M = K, Cs; T = Si, Ge) crystals were crystalized under inert gas by molten salt flux growth method. [Display omitted]