Calculates the corrected volume of element_a in an alloy with element_b, as defined by the Meidema model. See equation 2 of: http://dx.doi.org/10.1016/j.cpc.2016.08.013

Parameters:¶

element_a: str¶

The element for which to correct the volume.

element_b: str¶

The other element in the alloy.

surface_concentration_a: Number¶

The surface concentration of element_a, as calculated by: calculate_surface_concentration().