This week at school we did the Born-Mayer equation:

V=(N_{A}^{z}_{A}^{z}_{B}^{e2})/(4??_{0}d) x (1-d^{*}/d) x A

I know that v is the coulomic potential energy, A is the madelung constant, that N_{A} is the number of ions per formula unit, _{z}^{A} and _{z}^{B} represent the charge number of the ions, d is the distance between an anion and a cation, d^{*} is a constant (taken as 0.345 angstrom).

The problem that I found in understanding this equation is the significance of each component in the above equation. Can someone very briefly explain their significance.

I hope that this thread doesn't require any attempt to the question I asked.