The function ALFA[nco,eeta,con,ratio] calculates the "alpha" parameter for a 
mixture where:
->eeta=packing fraction
->con=list with the molar fractions of each species,e.g, {x_1,x_2,x_3}, 
        x_1 being the corresponding to the species with the largest diameter
->ratio=list with the diameter ratios, e.g., {1,ratio_2,ratio_3} where 
ratio_n=sigma_n/sigma_1=sigma_n

Off[General::spell];Off[General::spell1]

EXAMPLES

An example for a binary mixture:

An example for a binary mixture:

An example for a ternary mixture: