Volume size factor and lattice parameter in cubic intermetallics with L12 or B2 structure derived from the “Macroscopic Atom” model

Volume size factors and lattice parameters in cubic intermetallics with L12 or B2 structure have been derived from the “Macroscopic Atom” model. In a first step, an equation has been derived to calculate the volume size factor for binary solid solutions of two transition metals. Then, lattice parameters of cubic intermetallics were calculated with equations found in the literature which only make use of volume size factors and partial molar volumes. While large differences can be found between some of the predicted and observed volume size factors, differences between measured and calculated lattice parameters ranged from 0.05 to −5.45%.