Perovskite Structure Coordination Number

The coordination number of a perovskite structure compound refers to the number of atoms or ions that directly surround a central atom or ion within its crystal lattice. In the case of perovskite, the coordination number of the central metal cation is typically 6. This means that each metal cation is surrounded by six oxygen anions in an octahedral arrangement. The oxygen anions are positioned at the corners of the octahedron, while the metal cation occupies the center. However, it is worth noting that certain variations in the perovskite structure can alter the coordination number. For example, in a distorted perovskite structure, the coordination number of the metal cation may be reduced from 6 to 5 or even 4.