Ordered tetragonal spinel LiMnNbO4 prepared in reducing atmosphere

摘要

LiMnNbO4, the first quaternary compound in Li-Mn-Nb-O system, has been prepared by solid-state reaction in hydrogen atmosphere at 1050 degrees C. According to the X-ray Rietveld refinement results (R(F-2) = 0.0265, chi(2) = 2.765), it is isostructural with LiZnNbO4: tetragonal, P4(3)22, a = 6.1858(1), c = 8.5312(1) angstrom, Z = 4, spinel-derived, with Li and Nb ordered on octahedral sites and with Mn in tetrahedral coordination. (C) 2007 Elsevier Inc. All rights reserved.