We have prepared 90% single‐phase bulk samples of the 110 K superconducting phase of the Bi‐Sr‐Ca‐Cu‐O compounds with different Pb amounts. Critical superconducting temperatures (zero resistance) of up to 109 K were measured in the bulk samples. X‐ray powder diffraction patterns of the almost isolated 110 K phase are presented. Computer‐simulated diffractograms were obtained, which are in general agreement with the measured ones. A discussion of the role of Pb in the stability of the 110 K phase in this compound is presented.