Bi O3 Sr Kazakov S, Chaillout C, Bordet P, Capponi J, Nunez-Regueiro M, Rysak A, Tholence J, Radaelli P, Putilin S, Antipov E Nature (London) 390 (1997) 148-150 Discovery of a second family of bismuth-oxide-based superconductors _cod_database_code 1008815 _database_code_amcsd 0016685 5.9480 6.0951 8.4854 90 90.063 90 P2_1/n atom x y z Sr1 -.0152 .5455 .251 Bi1 0 0 0 Bi2 0 0 .5 O1 .4056 .4617 .241 O2 .284 .190 .546 O3 .187 .714 .556