Electrical conductivity of solid di(3,5-lutidinium)tetrachloro-manganate(II)

Abstract

The electrical and thermic properties of solid di(3,5-lutidinium) tetrachloromanganate (II) have been investigated in the temperature range from room temperature to the decomposition point (145°C). It was found that the relatively good electrical conductivity of the sample at room temperature (~10-2 S/m) with the activation energy of 13.4 kJ/mol, increases abruptly at 65°C, indicating its nearly superconducting properties. The temperature dependance of electrical conductivity was correlated with the nature of structural transformations, occurring upon the exposure of the sample to the temperature rise. It was suggested, by comparison of the results obtained by IR spectroscopy with those of the thermal analysis (DSC, TG), that the better electrical conductivity at higher temperatures is the result of the loosening and the partial cleavage of the hydrogen bonds, causing an activation of a larger number of the charge carriers. © 1988.