Synthesis and characterization of indium intercalated compounds of tungsten sulphoselenide

The present paper deals with the preparation of indium intercalated compounds of tungsten sulphoselenide, In1/3WSxSe2-x (0 less than or equal to x less than or equal to 2) and their characterization by various physicochemical methods. ?fie X-ray studies confirmed that all these compounds possess hexagonal symmetry and there exist no anisotropy towards the crystallite size. Room temperature magnetic susceptibility, thermoelectric power experiments and electrical conductivity measurements in the temperature range 25-350 degrees C indicated that In1/3WS2 and In1/3WSxSe2-x (0 less than or equal to x less than or equal to 2) compounds exhibit p- and n-type diamagnetic semiconducting behaviour respectively and results are explained on the basis of existing band model. Thermal stability of these compounds in air and nitrogen has also been studied and formation of tungsten bronze based on X-ray data of oxidized products has been proposed.