Crystal structure and magnetic properties of a one dimensional complex oxide Ca3NiMnO6

The results of structural refinements and magnetic properties of one-dimens ional oxide Ca3NiMnO6 are presented. The structure of Ca3NiMnO6 was solved by Rietveld analysis of powder neutron date in space group R-3c with a=9.12 27(9) Angstrom, c=10.5811(17) Angstrom, z=6 (type of K4CdCl6). Infinite cha ins of MnO6 octahedra and (Ni,Mn)O-6 trigonal prisms sharing faces run para llel ro the c axis. The chains are separated by Ca2+ cations, which are loc ated in a distorted square antiprismatic environment, Magnetic susceptibili ty obeys the Curie-Weiss law at 300-600 K with mu(eff) value 5.00 mu(B) con sistent with the valence cationic combination Ni2+-Mn4+. Magnetic measureme nts display the antiferromagnetic ordering in Ca3NiMnO6 at 16 K.