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The high pressure phases of the mercury and cadmium sulfides. selenides, and tellutrides have been determined by means of x-raiy diffraction patterns obtained while the materials are under presssure.
At 18 kilobars, tin telluride transforms from a sodium chloride-type structure to an orthorhombic crystal structure (space group Pnma). This structural change is accompanied by a 360-percent increase in electrical resistivity.