Stability field and phase transition pathways of hydrous ferric sulfates in the temperature range 50 °C to 5 °C: Implication for martian ferric sulfates

► Study of stability field and phase transition pathways of five hydrous Fe3+-sulfates. ► Found the boundaries of deliquescence zones and regions of stability fields. ► Observation of other important Fe3+-sulfates during the phase transition processes. ► Selection of experimental parameters to determine phase boundary. ► Developed the interpretation for an observed phenomenon on Mars.