ChemInform Abstract: Crystal Structure and Magnetic Properties of a One Dimensional Complex Oxide Ca3NiMnO6.
Abstract
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ChemInform Abstract
The title compound is prepared by solid state reaction of CaCO3, MnO2, and NiO (1. 950 °C, air, 30 h; 2. 1250 °C, 12 h). The structure of Ca3NiMnO6 is investigated by powder X-ray and neutron diffraction. The compound has a hexagonal unit cell, space group R
c (Z = 6). Face-sharing MnO6 octahedra and (Ni,Mn)O6 trigonal prisms form infinite chains along the c axis, which are separated by the Ca2+ cations. Magnetic measurements show Curie—Weiss behavior at 300—600 K and an effective moment of μeff = 5.00 μB, which is consistent with the valence combination Ni2+/Mn4+. Antiferromagnetic ordering occurs at 16 K.
