Citation: Suard, E; Caignaert, V; Maignan, A; Raveau, B (1991). The important role of pyramidal copper layers of the 123-structure in superconductivity. The oxides Ba~2~Y~1-x~Ca~x~Cu~3-x~Fe~x~O~7~ and Ba~2~Y~1-x~Ca~x~Cu~3-x~Fe~x~O~6~. Physica C (Amsterdam) (152,1988-), 182, pp. 219-227.
Formula: Ba2 Ca0.24 Cu2.76 Fe0.24 O7.04 Y0.76
Chemical name:Yttrium calcium barium copper iron(III) oxide (0.8/0.2/2/2.8/0.2/7)