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Lattice Energy Formula per mole is symbolized as
\begin{array}{l}U_{L} = \left (\frac{N_{A}\alpha Z^{2}e^{2}}{4\pi \varepsilon _{o}r^{2}o} \right )\left ( 1 – \frac{1}{n} \right )\end{array}
NA = Avogadro’s constant (6.022 × 1022)
α = Madelung constant
e = Electron charge (1.6022 × 10-19C)
Z+ and Z– = Cation and anion charge
ϵo = Permittivity of free space
n = Born Exponent
r0 = Closest ion distance
UL = equilibrium value of the lattice energy