The enthalpy of fusion K3TiF6Cl at the melting temperature (964 K) has been determined by treatment of the data for K3TiF6Cl and calibration substances measured by a high-temperature calorimeter in the DSC mode with a scanning rate of 1 K min(-1). The obtained value was Delta(fus)H(m)(K3TiF6Cl)=(42+/-3) kJ mol(-1).