“…The superconducting transition temperatures T c were 102.5 K, 118 K and 103 K, respectively. They were determined from the temperature dependences of dispersive and absorption part of ac susceptibility for Tl,Bi-1212 and of resistance for Tl,Pb-1223 and Bi,Pb--2223 with the overall accuracy ±0.1 K [3][4][5][6][7]. The oxygen stoichiometry of the Tl,Bi-1212 superconductor was y ≈ 7 [3].…”