What is an antiperovskite?

Answer 1

An antiperovskite is a crystal with a structure based on a perovskite but with the cations replaced by anions and vice versa.

Answer 2

An antiperovskite is a type of crystal structure with the formula A3BX, where A and B are metal cations and X is an anion. In antiperovskite structures, the anion occupies the central position instead of the metal cation, which is the case in the traditional perovskite structure. These materials often exhibit interesting physical properties like superconductivity and unusual magnetic behavior.