Citation: Michel, C; Er Rakho, L; Hervieu, M; Pannetier, J; Raveau, B (1987). Ba La4 Cu5 O13+d, an oxygen-deficient perovskite built pu from corner- sharing Cu O6 octahedra and Cu O5 pyramids. Journal of Solid State Chemistry, 68, pp. 143-152.
Formula: Ba Cu5 La4 O13.16
Chemical name:Barium lanthanum copper oxide (1/4/5/13.16)