Ternary vanadium sulfides

Ternary vanadium sulfides, MxVS2 (M = Fe, Co, Ni), with x = ¼, 1/3, ½, were prepared and studied. The x = ¼ and x = ½ series are isostructural with V5S8 and V3S4, respectively, while compounds with appear to have the hexagonal Cr2S3 structure. Structures of NiV2S4 and NiV4S8 were refined from powder X-ray diffraction intensities. Magnetic and electrical properties reveal that M ions in these sulfides exist in the divalent state having localized moments, while the vanadium 3 d electrons are itinerant