| Abstract | A new compound, Sr3La2Ti2O10, has been prepared and characterized by a combination of X-ray diffraction and high-resolution electron microscopy. It is monoclinic (space group P21/m, a = 6.9159(3) Å, b = 5.5252(2) Å, c = 12.2953(7) Å, and β = 85.443(4)°) and refinement of metal positions has been carried out using Rietveld analysis. The structure contains corner-sharing TiO6 octahedra like those in perovskite, but arranged in ribbons separated by rock-salt layers of Sr/La atoms. The ribbons are one octahedron high and four octahedra wide; efforts to prepare compounds with different widths resulted in mixed layer intergrowths. This new structure may be part of a wider family containing essentially one-dimensional elements of perovskite of special interest to high-temperature superconductivity. © 1995. |
