Mechanisms of cristalline body melting and phase transfer effects in melts

High-pure metals-mercury, gallium, bismuth, tin in solid and liquid states are considered in the paper aiming at the nature clarification of the abnormal behaviour of high-pure matter heat capacities in the region of their pre-melting. The investigation of temperature dependences of heat capacities of melts of these matters is also the aim of the paper. As a result it has been shown for the first time, that anomalies of heat capacities of mercury, bismuth and tin are conditioned by the formation of grid vacancies only in far regions of pre-melting. Near the melting temperature of these matters the formation of new effects, forecasted by the model of disoriented crystalline clasters, takes place. The obtained precision experimental values of heat capacities of mercury and gallium are the important reference data and are being used as standard ones by the SODATA international organization and IVTANTERMO bank of thermodynamic data. The results obtained are also important in the melt use in chemical and metallurgical industries and in the growth of monocrystals with the given properties from meltsAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio