General expression for the density dependence of the mori coefficients

The particular expression that relates the first Mori coefficients of the solvent particles with the solute particles as a function of their masses m₁ and m₂ is generalized to the case of the solute particle also having a different volume. The resulting density relationship, in terms of the mass factor M(m₂) and coupling constants C_D, is also valid for the second Mori coefficients and for two- and three-dimensional system. © 1992 by John Wiley & Sons, Inc.