. What is Anti-Fluorite Structure

Best Answer

This structure is shown by Li₂O. Oxide ions are face centered cubic position and lithium ions are present in all the tetrahedral voids. There are four oxide ions and eight lithium ions per unit cell. As it can be seen, this unit cell is just the reverse of Fluorite structure, in the sense that, the positions of cations and anions is interchanged. Other substances which exist in this kind of a structure are Na₂O, K₂O and Rb₂O.