Synthesis,Structure,and Magnetic Properties of a New Cobalt Selenite Ca_2Co(HSeO_3)_2(SeO_3)_2  

作　　者：徐锦秋 项红萍 张素允 汤莹莹 郭文彬 王琳 何长振 

机构地区：[1]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences [2]Graduate School of the Chinese Academy of Science

出　　处：《Chinese Journal of Structural Chemistry》2016年第10期1558-1562,共5页结构化学（英文）

基　　金：financially supported by the National Basic Research Program of China(No.2012CB921701);the National Natural Science Foundation of China(No.21573235;21403234)

摘　　要：A new cobalt selenite,Ca_2Co（HSeO3）_2（SeO_3）_2,was synthesized by a conventional hydrothermal method. Single-crystal X-ray diffraction analysis reveals that Ca_2Co（HSeO3）_2（SeO_3）_2 crystallizes in triclinic system,space group P1,with a = 5.330（5）,b = 7.047（7）,c = 8.457（9） ？,V = 285.0（5） ？~3,Z = 1,Mr = 646.93,Dc = 3.769,μ = 15.235 mm^（-1）,F（000） = 299.0,the final R = 0.0452 and wR = 0.1169 for observed 1265 reflections with I 〉 2σ（I）. The title compound consists of isolated chains built from CoO_6 octahedra and SeO_3 pyramids. In this structure,the chains are separated by Ca^（2＋） cations. Magnetic measurements confirm that the title compound exhibits long-range antiferromagnetic ordering at 3 K and field-induced magnetic transition at 2 T.A new cobalt selenite,Ca_2Co（HSeO3）_2（SeO_3）_2,was synthesized by a conventional hydrothermal method. Single-crystal X-ray diffraction analysis reveals that Ca_2Co（HSeO3）_2（SeO_3）_2 crystallizes in triclinic system,space group P1,with a = 5.330（5）,b = 7.047（7）,c = 8.457（9） ？,V = 285.0（5） ？~3,Z = 1,Mr = 646.93,Dc = 3.769,μ = 15.235 mm^（-1）,F（000） = 299.0,the final R = 0.0452 and wR = 0.1169 for observed 1265 reflections with I 〉 2σ（I）. The title compound consists of isolated chains built from CoO_6 octahedra and SeO_3 pyramids. In this structure,the chains are separated by Ca^（2＋） cations. Magnetic measurements confirm that the title compound exhibits long-range antiferromagnetic ordering at 3 K and field-induced magnetic transition at 2 T.

关 键 词：cobalt selenite hydrothermal reaction crystal structure magnetic material 

分 类 号：O641[理学—物理化学]