ANALYSIS OF THE TEMPERATURE-DEPENDENCE OF THE HEAT-CAPACITY OF SOLID TIN IN THE VICINITY OF ITS MELTING TEMPERATURE

The experimental temperature dependence of the heat capacity C-p (T) o f solid tin (Sn) in its premelting region 402.07-502.22 K was investig ated and two regions with different temperature dependences of C-p (T) were found. In the far (from the melting temperature T-m) region 402. 07-485.88 K the experimental C-p (T) of Sn is described by the standar d vacancy model. In the close region 485.88-502.22 K it is described b y the formation of complicated volumetric defects in the crystalline l attice of solid Sn near its T-m.