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This document summarizes a study on the influence of Ti/Al substitution on cationic order in Ba6-x-yLa8+2/3x+yTi18-yAlyO54 solid solutions. The crystal structure belongs to the tetragonal tungsten bronze type with space group Pnma. Two structural models were developed to describe different orders within the structure - Model I corresponds to infinite perovskite rows parallel to the Oy axis based on (3x3) TiO6 octahedra, while Model II can be described based on three perovskite octahedron layers parallel to

Author

fouad alimdar

Language

EN