A SAED and HREM study of structural defects in brownmillerite, LaBa(x)Sr(1-x)CuGaOy related oxides.
The synthesis and microstructural characterization, by means of selected area electron diffraction (SAED) and high resolution electron microscopy (HREM), of the solid solution LaBa(x)Sr(1-x)CuGaO5 (0.1 < or = 5 x < or = 0.9) is reported. Although an average brownmillerite Ima2 structure is proposed for the whole compositional range, SAED and HREM clearly show that structural defects appear as barium content increases.
Ruiz-González
Maria Luisa
ML
Departamento Química Inorgánica, Facultad de Químicas, Universidad Complutense, Madrid, Spain.
González-Calbet
José M
JM