SYNTHESIS AND CHARACTERIZATION OF LA2-XBA1+XCU2O6+DELTA

Specimens of La2-xBa1+xCu2O6+delta have been synthesised with 0.25 gre ater than or equal to x greater than or equal to 0. The structure of L a1.8Ba1.2Cu2O6.1 was determined by X-ray ponder diffractometry and hig h resolution electron microscopy to be isostructural to La2SrCu2O6, ha ving an orthorhombic basic unit cell with a = 3.87, b = 3.90 and c = 2 0.81 Angstrom. The oxygen contents were determined by temperature prog rammed reduction. An 1 x 3 x 1 superstructure was observed It is belie ved that the non-superconducting properties of this material is result ed from the location of oxygen vacancies in the CuO2 planes.