Abstract

Silver mercury iodide, Ag 2HgI 4, has been studied to pressures of 75–100 kbar at 25°C. There are now four high pressure phases known. Transport studies indicate predominantly electronic conduction, with the highest pressure phase showing rectification in an asymmetric conductivity cell. Optical studies now corroborate the four high pressure phases. For two of the phases the energy gap shifts to lower energies with increasing pressure.

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