An investigation was made of the electrolytic properties of tin difluoride. In this paper, special attention was given to development of synthetic methods and to study of the relation of the properties of tin difluoride to the methods of preparation and treatment of the samples. It is found that the absence of a discontinuity on the log sigma -1/T curves during melting and solidification indicated closeness of the nature and mechanism of electric conductivity of tin difluoride in the solid state and in the melt at elevated temperatures. In addition, the SnF//2 melt apparently consisted of a highly structured phase, the local environment of tin in which differed little from its coordination in the high-temperature solid-phase modification. The possibility of obtaining nuclear gamma -resonance spectra for the tin(II) diflouride melt and the monotnic nature of the changes of the parameters of the Moessbauer spectra during melting support the assumption of closeness of the structure of the structural units existing in the melt and in the solid state of tin difluoride.