data_global _amcsd_formula_title 'Ba Cu O6 Sr Tl2' loop_ _publ_author_name 'Martin C' 'Maignan A' 'Huve M' 'Michel C' 'Hervieu M' 'Raveau B' _journal_name_full 'European Journal of Solid State and Inorganic Chemistry' _journal_volume 30 _journal_year 1993 _journal_page_first 7 _journal_page_last 18 _publ_section_title ; The influence of alkaline-earth ions on the properties of the "2201" superconductive cuprates: the solid solution Tl2Ba2-xSrxCuO6+d _cod_database_code 1001521 ; _database_code_amcsd 0012561 _chemical_formula_sum 'Tl2 (Ba Sr) Cu O6' _cell_length_a 3.7988 _cell_length_b 3.7988 _cell_length_c 22.7109 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 327.738 _exptl_crystal_density_diffrn 8.038 _symmetry_space_group_name_H-M 'I 4/m m m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' '-y,-x,z' '1/2-y,1/2-x,1/2+z' 'y,x,-z' '1/2+y,1/2+x,1/2-z' 'y,-x,-z' '1/2+y,1/2-x,1/2-z' '-y,x,z' '1/2-y,1/2+x,1/2+z' 'x,-y,z' '1/2+x,1/2-y,1/2+z' '-x,y,-z' '1/2-x,1/2+y,1/2-z' 'x,y,-z' '1/2+x,1/2+y,1/2-z' '-x,-y,z' '1/2-x,1/2-y,1/2+z' 'y,x,z' '1/2+y,1/2+x,1/2+z' '-y,-x,-z' '1/2-y,1/2-x,1/2-z' '-y,x,-z' '1/2-y,1/2+x,1/2-z' 'y,-x,z' '1/2+y,1/2-x,1/2+z' '-x,y,z' '1/2-x,1/2+y,1/2+z' 'x,-y,-z' '1/2+x,1/2-y,1/2-z' '-x,-y,-z' '1/2-x,1/2-y,1/2-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Tl1 0.04200 0.00000 0.20190 0.25000 Ba1 0.50000 0.50000 0.08300 0.50000 Sr1 0.50000 0.50000 0.08300 0.50000 Cu1 0.00000 0.00000 0.00000 1.00000 O1 0.00000 0.50000 0.00000 1.00000 O2 0.00000 0.00000 0.10700 1.00000 O3 0.62000 0.00000 0.20700 0.25000