WE PROPOSE A THREE YEARS INVESTIGATION TO STUDY THE PHASE TRANSFORMATIONS OF PLANETARY SURFACE MATERIALS (CL- FE- AND S-BEARING SPECIES) INDUCED BY ELECTROSTATIC DISCHARGE (ESD) THAT OCCURS DURING ATMOSPHERIC PROCESSES NEAR/AT THE SURFACES OF MARS AND VENUS. THIS EXPERIMENTAL INVESTIGATION ON ELECTROCHEMICAL PROCESSES IN RELEVANT PLANETARY ENVIRONMENTS HAS THE POTENTIAL TO INTERPRET SOME MISSION OBSERVATIONS THAT ARE HITHERTO DIFFICULT TO BE FULLY UNDERSTOOD ON THE BASIS OF CURRENT PHOTOCHEMISTRY AQUEOUS CHEMISTRY AND THERMAL CHEMISTRY.