[en] Peculiarities of chemical transport of transition metal dichalcogenides, intercalated by rare earths during their growth from gaseous phase were analyzed. Dependence of partial pressure of gaseous phase components on the values of equilibrium constant was calculated under conditions, typical for crystal growth of mentioned dichalcogenides and intercalates. It is shown that such gas-transport systems are characterized by rather high values of common pressure, which is determined by iodine (transporting agent) pressure. Models, taking account of convective components of mass flow can be applied for describing mass transfer process in the given case. 3 refs.; 1 fig