Cu2 Nd O7 Sr2 Tl Huve M, Martin C, Michel C, Maignan A, Hervieu M, Raveau B Journal of Physics and Chemistry of Solids 54 (1993) 145-152 Influence of the size of alkaline earth cations on the structural distortion and transport properties of the semiconducting 1212 - type cuprates TlBa2-xSrxLnCu2O7 _cod_database_code 1001524 _database_code_amcsd 0013239 3.8503 3.8503 12.0724 90 90 90 P4/mmm atom x y z occ Tl1 .069 0 0 .25 Sr1 .5 .5 .2092 Nd1 .5 .5 .5 Cu1 0 0 .3581 O1 0 .5 .366 O2 0 0 .176 O3 .5 .5 0