화학공학소재연구정보센터
Inorganic Chemistry, Vol.55, No.24, 12512-12515, 2016
Manganese Vanadate Chemistry in Hydrothermal BaF2 Brines: Ba3Mn2(V2O7)(2)F-2 and Ba7Mn8O2(VO4)(2)F-23
Manganese vanadate fluorides were synthesized using high-temperature hydrothermal techniques with BaF2 as a mineralizer. Ba3Mn2(V2O7)(2)F-2 crystallizes in space group C2/c and consists of dimers built from edge-sharing MnO4F2 trigonal prisms with linking V2O7 groups. Ba7Mn8O2(VO4)(2)F-23 crystallizes in space group Cmmm, with a manganese oxyfluoride network built from edge- and corner-sharing Mn2+/3+(O,F)(6) octahedra. These octahedra form alternating Mn2+ and Mn2/3+ layers separated by VO4 tetrahedra. This latter compound exhibits a canted antiferromagnetic order below T-N = 25 K.