A series of cuprates of type Bi-0212 has been prepared. The crystal structure was refined from neutron powder diffraction data at room temperature and 10 K as tetragonal (space group I4/mmm). Mossbauer and susceptibility measurements of the Fe substituted material indicate the development of a spin glass-like behavior at low temperatures. Superconductivity with T c around 30 K is observed in the system Bi 0 . 5 La 1 . 5 - x Y x SrCu 2 O y . An increase of the hole-carrier concentration is obtained by suitable incorporation of Bi, Pb, La and Sr on the nine coordinated 4e positions with an improvement of T c to 75 K.