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Abstract
A variety of the known structures of perovskite-like crystals including cation- and aniondeficient phases were considered as the intergrowth systems of slabs containing n-layers (n = 1,2,3,…∞) of corner-linked octahedra BX 6, pyramids BX 5 or square-planar nets BX 4 (B – cation, X – anion) linked by intermediate blocks of different types.[1–3] Some new structural types and new representatives of ferroelectrics, ferroelastics and HTSC's can be constructed on this basis. The prognosis of new possible representatives in Ruddlesden – Popperf's family is discussed.