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Abstract:
Through a solid-state reaction between stoichiometric amounts of a mixed
cesium oxide Cs2O1.3, VS, S, and V2O5, a polycrystalline powder of
CsV2S2O was obtained. Small single crystals could be grown in a CsCl
melt by allowing Cs2SO4, V metal and S powders to react. The crystals
have a plate-like morphology, consistent with the tetragonal
crystal-structure symmetry [P4/mmm, a = 3.9455(1), c = 7.4785(1)
angstrom]. Magnetic measurements suggest that CsV2S2O is a
temperature-independent paramagnet, and resistivity data concur with a
bad metal. The mixed oxidation state of V on one crystallographic site
offers a tentative explanation of the electronic properties of the title
compound.
