Stabilite relative des environnements octaedrique et prismatique triangulaire dans les oxydes lamellaires alcalins AxMO2 (x ⩽ 1)

The relative stability of octahedral and trigonal prismatic coordination in layered oxides AxMO2 (x ⩽ 1) is discussed. It depends on the size of cations, their electronegativities and the alkali content. Rouxel's diagram for the AxMS2 intercalation compounds allows a classification of both types of environment.