Enter the numerical ion charges and the distance between ion centers into the calculator to determine the lattice energy.

## Lattice Energy Formula

The following formula is used to calculate a lattice energy between ions.

LE = (K * Q1 * Q2) / R

- Where LE is the lattice energy
- K is the constant (2.31 * 10 ^ -19 (J*nm)
- Q1 is the numerical ion charge of ion 1
- Q2 is the numerical ion charge of ion 2
- R is the distance between ions (nm)

## Lattice Energy Definition

A lattice energy is defined as the total energy released when two charge gas ions attract and form a solid.

## Lattice Energy Example

How to calculate lattice energy?

**First, determine the charge of ion 1.**For this example we will say ion 1 has a charge of (-1).

**Next, determine the charge of ion 2.**For this example we will say ion 2 has a charge of (+2).

**Next, determine the distance between ions.**We find the ions for this example to be at a distance of 3 nm.

**Finally, calculate the lattice energy.**Using the formula and the values from steps 1-3 we find the lattice energy to be, 1.54e^-19.

## FAQ

**What is lattice energy?**

Lattice energy is the total energy released when two oppositely charged gas ions attract to each other a form a solid.