Two tetravalent uranium silicate and germanate crystals with three membered single-ring by molten salt method:K_(2)USi_(3)O_(9)and Cs_(2)UGe_(3)O_(9)  

作　　者：Xu Zhang Lei Zhang Tao Bo Shanen Huang Zhiwei Huang Weiqun Shi 

机构地区：[1]Engineering Laboratory of Advanced Energy Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [2]College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China [3]School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China [4]Laboratory of Nuclear Energy Chemistry,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Chemical Letters》2022年第7期3527-3530,共4页中国化学快报（英文版）

基　　金：supported by the National Science Fund for Young Scholars(No.22106165);the National Science Fund for Distinguished Young Scholars(No.21925603);the Major Program of the National Natural Science Foundation of China(No.21790373);the National Natural Science Foundation of China(No.U20B2020)。

摘　　要：Two tetravalent uranium silicate and germanate M_(2)U^(Ⅳ)T_(3)O_(9)(M=K,Cs;T=Si,Ge)crystals were crystalized under inert gas by molten salt flux growth method.K_(2)USi_(3)O_(9)(1)crystallizes in the monoclinic space group P1_(21)/n1 with lattice parameters a=7.1076?,b=10.4776?,c=12.2957?,γ=120°and V=915.67?^(3).Cs_(2)UGe_(3)O_(9)(2)crystallizes in a hexagonal space group P-6 with lattice constants of a=7.5138?,b=7.5138?,c=11.0114?,γ=120°and V=538.38?^(3).Bond valence calculations indicate tetravalent uranium in both structures,which contain three-membered single-ring T_(3)O_(9)^(6-) trimers.K_(2)USi_(3)O_(9) is the first uranium silicate that contains the Si_(3)O_(9)^(6-) trimers.

关 键 词：Uranium silicate Uranium germanate Framework Single crystal Molten salt method 

分 类 号：TL211[核科学技术—核燃料循环与材料] O782[理学—晶体学]