COMPLEX OXIDES WITH INTERGROWTH STRUCTURE S

The regularity of formation of some complex perovskite-like oxides hav e been considered. The crystal structures of these compounds can be fo rmally described as an alternation of different structural blocks alon g three-fold or four-fold axis of perovskite subcell. This approach ha ve been successfully used for syntheses of a large number of new compl ex transition metal oxides including Hg-containing family of high-temp erature superconductors with a highest values of T-c.