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,sp...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.展开更多
基金financially supported by the National Basic Research Program of China(No.2012CB921701)the National Natural Science Foundation of China(No.2157323521403234)
文摘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.
