Ionic radius is the measure of the size of an ion in a crystal lattice. It is defined as half the distance between the nuclei of two ions that are just touching each other in a crystal lattice. Ionic radius is typically expressed in picometers (pm) or angstroms (Å). Ionic radius can vary depending on the charge and electron configuration of the ion. Smaller ions tend to have higher charges and larger ions tend to have lower charges.
