Prediction of temperatures of certain nonvariant equilibria in REM-p-element of 4 group-system

Systems formed by rare-earth metals and Ge, Sn, Pb are considered. It is shown that temperatures of some phase equilibria in them linearly depend on melting temperatures of pure rare-earth metals. A statistical processing of data from literature on temperatures of nonvariant equilibria is carried out. The equation permits determining equilibria temperatures in systems not investigated previously. The results of studies have shown validity of the lsuggested model for prediciton of temperatures of certain nonvariant equilibria in systems with REM