DC electrical conductivity measurements on KCl and KNO3-added MgSO4·7H2O single crystals

Pure and impurity-added (with KCl and KNO3) MgSO4·7H2O single crystals were grown by the free-evaporation method and characterized by density and DC electrical conductivity measurements. The present study indicates that the conductivity increases with temperature but does not vary systematically with impurity concentration. Activation energies were also estimated.