Ba3 Cu3 O19 Sr5 Tl5 Letouze F, Martin C, Hervieu M, Michel C, Maignan A, Raveau B Journal of Solid State Chemistry 128 (1997) 150-155 A new structure related to the layered cuprates: the "1201" shear-like phase Tl5Ba3Sr5Cu3O19, third member of the series (TlA2CuO5)m . (Tl2A2O4) _cod_database_code 1001803 _database_code_amcsd 0013914 3.7536 30.631 9.219 90 90 90 A2mm atom x y z occ Tl1 0 0 .5 Tl2 0 .1128 .5 Tl3 0 .2397 .5 Ba1 .5 .0615 .2011 .275 Sr1 .5 .0615 .2011 .725 Ba2 .5 .1844 .2152 .475 Sr2 .5 .1844 .2152 .525 Cu1 0 0 0 Cu2 0 .1212 0 O1 .5 0 0 O2 .5 .1212 0 O3 0 0 .263 O4 0 .1212 .263 O5 0 .0606 0 O6 .5 .056 .5 O7 .5 .176 .5 O8 0 .25 .25 O9 0 .186 0