M. Wakeshima et al., Crystal structures and magnetic properties of ordered perovskites Ba(2)LnIrO(6) (Ln = lanthanide), J MAT CHEM, 10(2), 2000, pp. 419-422
The crystal structures and magnetic properties of ordered perovskites Ba(2)
LnIrO(6) (Ln = lanthanide) are reported. They were determined to have monoc
linic perovskite-type structures with space group P2(1)/n. Their magnetic s
usceptibilities were measured from 2 to 350 K. Ba2CeIrO6 and Ba2PrIrO6 show
antiferromagnetic transitions at 17 and 71 K, respectively. In these compo
unds, the Ce and Pr ions are found to be in the tetravalent state from anal
ysis of their crystal structures and magnetic susceptibilities.