A Cd analogue of the T1 and Hg n=3 series with nominal composition CdB
a2Ca2Cu3Oy has been synthesized. The samples were superconducting acco
rding to magnetic susceptibility measurements. The critical temperatur
e was 103 or 107 K depending on the preparation conditions. The EDX an
alysis revealed the presence of Cd-1111, Cd-1121, and Cd-2333 as minor
phases. The observed diamagnetic effects were attributed to the diffe
rent T-c of these phases.