文摘
New tellurite鈥搒ulfate compounds M2(TeO3)(SO4)路H2O (M = Co, Mn) are synthesized by a conventional hydrothermal method. Two compounds are found to exhibit a similar structure, which both crystallize in the orthorhombic system of space group Pbcm. Te4+ ions are coordinated by three O atoms, forming a quite distorted TeO3 trigonal pyramid with lone-pair electrons, while magnetic Co2+ or Mn2+ ions construct a wavelike layer with a distorted honeycomb spin鈥搇attice. Magnetic measurements confirm that two isostructural compounds display different magnetic behaviors, in which Co2(TeO3)(SO4)路H2O shows a canted antiferromagnetic ordering at 15 K, while Mn2(TeO3)(SO4)路H2O shows a collinear antiferromagnetic ordering at 28 K. The nature of different magnetic behaviors between two isostructural compounds is also discussed.