The volume expansion factor associated with the liquid-solid transition at the triple point, ε=V_{l t} /V_{s t} , is a fluid characterizing parameter that finds utility in the prediction of the transport properties of substances in their dense gaseous and saturated and compressed liquid states. Values of this factor were independently established from the generalized treatment of self-diffusivity, viscosity and thermal conductivity involving information relating to these transport properties for monatomic, diatomic, and polyatomic substances and hydrocarbons of all types of molecular complexity.
These values, derived from each of these transport properties, were found to be consistent and in agreement with each other and corresponding experimental measurements. This factor has been applied to the development of a relationship capable for its generalized prediction using information relating to Z_c, the critical compressibility factor and T_Rt the reduced temperature at the triple point.
Values of ε obtained from limited experimental measurements were compared with values predicted by this method and were found to be in close agreement with corresponding values resulting from experimental measurements. Therefor, this development can be made to apply in a generalized manner to all types of substances.