Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

While selfdiffusion coefficients D_ii are always positive, the stability conditions admit both signs of the interdiffusion coefficients D_ij (i ≠ j). In a multicomponent system (n > 2) with opposite signs of interdiffusion (at least within some range of concentrations and temperatures) there might occur anomalous evolution of concentrations, e.g. the damped oscillations of extremal values for some x²/t.