Abstract
A novel quasi-one-dimensional (Q1D) compound KNi5Bi5.6 has been synthesized and its crystal structure has been determined by X-ray crystallography. The structure contains double-walled anionic nanowires [Ni5Bi5.6]− separated by potassium cations. KNi5Bi5.6 forms a new series of compounds together with previously reported Bi5.6Ni5I and Bi28Ni25 featuring [Ni5Bi5.6]x (x = 1+, 0, 1−) nanowires for which the charge can be cationic, neutral or anionic without appreciably affecting the structure and composition. This unique characteristic provides a new platform to investigate charge invertible Q1D transition metal systems. Resistivity measurement of KNi5Bi5.6 reveals a metallic type of conductivity. Magnetic susceptibility obeys a modified Curie-Weiss behavior with a small average effective magnetic moment of Ni and shows a weak magnetic anisotropy.
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