TEMPERATURE-DEPENDENCE OF THE ELECTRICAL-CONDUCTIVITY OF SELENOUS ACID AND ITS TRANSITION-METAL SELENITES

The electric conductivity has been measured over a wide range of tempe ratures including phase transition temperatures of selenous acid and i ts transition metal selenites. The effect of hydro en bonding formatio n of the crystal structure, as well as, the ion pair formation on the conduction mechanism in the low and high temperature regions was visua lized using infrared spectra. The values of thermal activation energie s obtained from the electrical conductivity measurements indicate that selenous acid at measuring temperatures and the transition metal sele nites at high temperatures behave like semiconducting materials. The t ransfer of protons along the lines of hydrogen bonds via removal of wa ter molecules during dehydration, and ion pair formation was considere d to be the main source participating in the conduction processes.