Single Crystal Growth and Structural Chemistry of Li1-zNi1+zO2 with z=0.075

Single crystals of the lithium nickel dioxide compound Li1-zNi1+zO2 with z=0.075 have been successfully synthesized by a flux method for the first time. A single-crystal X-ray diffraction study confirmed trigonal symmetry, R m space group, and the lattice parameters a=2.8899 (13) ? and c=14.1938(17) ?. The cation distribution in Li0.925Ni1.075O2 was determined to be (Li0.744Ni0.256)3a[Li0.181Ni0.819]3bO2 with a final R value of 2.68% using 202 independent observed reflections. The relationships between cation distributions and structural parameters for Li1-zNi1+zO2 compounds have been summarized and discussed using the 37 reported structural data. The magnetization measurements of the present single crystal samples confirmed the history dependence of temperature versus M/H maximum at about 60 K.