Rare-earth ferricyanides and chromicyanides LnT(CN) 6· nH 2O

Abstract

Single crystals of the rare-earth ferricyanides and chromicyanides have been grown by a double-infusion technique. These compounds are characterized structurally and magnetically. The complexes with nonmagnetic rare-earth ions are presumably all antiferromagnetic at low temperatures; those with magnetic rare-earth ions are antiferromagnetic or ferrimagnetic. In the first group, magnetic ordering is due to superexchange via five nonmagnetic ions and LuCr(CN) 6·4H 2O has the highest ordering temperature ever found for such a long interaction path.