Ca0.27 Cu2.969 O7.73 Pb2 Sr1.968 Y0.73 Chaillout C, Chmaissen O, Capponi J, Fournier T, McIntyre G, Marezio M Physica C 175 (1991) 293-300 The structure of superconducting Pb2 Sr2 Y0.73 Ca0.27 Cu3 O8 by single- crystal neutron diffraction _cod_database_code 1008713 _database_code_amcsd 0016597 5.3835 5.4091 15.784 90 90 90 Pman atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Pb1 0 .5035 .38695 .020 .013 .0060 0 0 -.002 Sr1 0 -.0010 .21959 .984 .011 .007 .0083 0 0 .006 Ca1 0 0 0 .27 .013 .003 .0066 0 0 .006 Y1 0 0 0 .73 .013 .003 .0066 0 0 .006 Cu1 0 0 .5 .989 .16 .018 .0095 0 0 .002 Cu2 0 .5010 .10597 .990 .006 .018 .0084 0 0 .003 O1 0 .4955 .25177 .965 .012 .016 .0066 0 0 .004 O2 0 -.0630 .3844 .900 .120 .0116 .0060 0 0 -.0009 O3 .25 .25 .0943 .009 .005 .0146 .002 0 0 O4 .25 .25 -.0951 .009 .005 .0146 .002 0 0