Ilms of 2-methylbenzimidazole perchlorate С$_8$Н$_8$N$_2$–HClO$_4$: phase transformations, crystal structure and dielectric properties

Films of the semiorganic compound 2-methylbenzimidazole perchlorate, MBI $\cdot$ HClO$_4$, were grown by evaporation at room temperature from an aqueous solution of MBI $\cdot$ HClO$_4$ on quartz glass and sapphire substrates. The results of temperature changes in capacitance, dielectric losses and conductivity of films with simultaneous registration of phase transformations using a polarizing microscope, as well as the results of X-ray diffraction measurements of the crystal structure of MBI $\cdot$ HClO$_4$ films before and after melting and crystallization are presented.