On top of that, by inspecting a series of 87 An + 1BnX3n + 1-kind Ruddlesden–Popper (RP) oxides and halides with high symmetry, we observed this area-demand-induced tetragonal elongation of oxygen octahedra is usually a placing prevalent feature noticed in almost all of the RP phases getting the charged [AO] https://crithitceramics.com/contact-us/