Cluster Theory for Fluorite-like Fluorides Containing Anionic Cuboctahedra

The article reports on the main steps of the cluster theory for fluorite-like fluorides containing anionic cuboctahedra. There are four parts of this theory: 1) findings of the structure building fragment – cluster; 2) interpretation of known structures; 3) theoretical derivatives for the clusters connections; 4) forecasting and confirmation of the derived theoretical structures. All cations of the structures under consideration were divided into three groups (A, B and C). All anions were divided into three groups (X, Y and Z) as well.