A preliminary report of some of the results of the measurements of the electrical conductivity of HgCl², HgBr², HgI² and an equi-molar mixture of HgCl² and HgBr² and another of HgBr² and HgI², all these being pressed to 10 tons/cm2 of pressure, are reported. The very low value of the electrical conductivity of the two equimolar mixtures, compared to those of the corresponding double halides strongly suggests formation of some new product in both the cases. This is also supported by the X- ray diffractograms of the compounds. Finding the nature of the product is a matter for detailed study before any reliable conclusions can be drawn.