The effect of oxygen nonstoichiometry and barium cation substitution o
n the structure and superconducting properties of Bi2Ba2-xMxCuO6+delta
(M = Sr, Ru,Rh, Pd, In, Sb or Pb; x changed from 0 to 0.2) were studi
ed. The cation-substituted samples annealed in oxygen flow contain a s
uperconducting phase with T-c(init) near 95 K. (C) 1997 Academic Press
Limited.