Cu2 O5.667 Pr Sr2 Lucas S, Caignaert V, Hervieu M, Michel C, Raveau B European Journal of Solid State and Inorganic Chemistry 29 (1992) 399-409 The layered cuprates Sr2-xLn1+xCu2O6-d: a structure built up from the two limit structures Sr2LnCu2O6 and Sr6Ln3Cu6O17 (Ln=Pr,Y) _cod_database_code 1001506 _database_code_amcsd 0012554 3.7626 11.5157 20.1199 90 90 90 Immm atom x y z occ Pr1 0 0 0 Sr1 0 .3005 0 .27 Pr2 0 .3005 0 .73 Sr2 0 0 .1968 .73 Pr3 0 0 .1968 .27 Sr3 0 .3229 .1772 Cu1 0 0 .5881 Cu2 0 .3517 .6007 O1 0 .1614 .4152 O2 0 .1361 .0976 O3 0 0 .6849 O4 0 .3482 .7012 O5 0 .3668 .5 O6 .295 0 .5 .5