Borne Lande Equation Formula

Equation for calculate borne lande equation is,

$$U=\frac{N_{A}M{z}^{+}{z}^{-<!--\; -\; -->}{e}^2}{4\mathrm{\pi <!--\; \pi \; -->}{\epsilon }_{0}r}(1-<!--\; -\; -->\frac{1}{n})$$

Where,
U = Lattice Energy ;
N_A= Avogadro Number (6.022140857 × 10 ²³);
M= Madelung Constant ;
z⁺, z^- = Charge on the Cation & the Anion;
e = Change of an electron;
n = Born Exponent;
r = Inter ionicDistance;
ε_o = Permitivity of free Space (8.85 x 10^-12);