“…Third, the special features of the intermolecular interactions resulting in the formation of the clathrate compound, that is, introduction of the parameter z, since its molecular volume is not equal to the sum of volumes of individual molecules constituting clathrate compound. Hence, according to Eqs (15). and(16), to eliminate the effect of geometric factor, the behavior of the relative excess must be investigated.Let us estimate the contribution of the difference in geometric structures of liquids constituting mixture to the excess molar volume.…”