data_global _amcsd_formula_title 'Tl3(CrO4)Sr8Cu4O16' loop_ _publ_author_name 'Martin C' 'Letouze F' 'Maignan A' 'Seshadri R' 'Michel C' 'Hervieu M' 'Raveau B' _journal_name_full 'Chemistry of Materials' _journal_volume 8 _journal_year 1996 _journal_page_first 865 _journal_page_last 873 _publ_section_title ; The superconducting copper oxychromate Tl3(CrO4)Sr8Cu4O16: long- range ordering between thallium and chromium _cod_database_code 1001725 ; _database_code_amcsd 0012210 _chemical_formula_sum 'Tl3 Cr Cu4 Sr8 O20' _cell_length_a 3.778 _cell_length_b 15.244 _cell_length_c 17.67699 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1018.050 _exptl_crystal_density_diffrn 6.330 _symmetry_space_group_name_H-M 'A m m 2' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2+y,1/2+z' 'x,-y,z' 'x,1/2-y,1/2+z' '-x,y,z' '-x,1/2+y,1/2+z' '-x,-y,z' '-x,1/2-y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Tl1 0.00000 0.21800 0.00000 Tl2 0.00000 0.00000 0.00000 Cr1 0.00000 0.00000 0.50000 Cu1 0.00000 0.00000 0.74710 Cu2 0.00000 0.00000 0.25290 Cu3 0.00000 0.25000 0.25000 Sr1 0.50000 0.12100 0.15230 Sr2 0.50000 0.36600 0.14740 Sr3 0.50000 0.13400 0.35260 Sr4 0.50000 0.37800 0.34770 O1 0.50000 0.00000 0.26700 O2 0.50000 0.00000 0.73300 O3 0.50000 0.25000 0.25000 O4 0.00000 0.12500 0.25620 O5 0.00000 0.12500 0.74380 O6 0.00000 0.00000 0.10200 O7 0.00000 0.00000 0.43000 O8 0.00000 0.00000 0.57000 O9 0.00000 0.00000 0.89800 O10 0.00000 0.25000 0.10800 O11 0.00000 0.25000 0.89200 O12 0.50000 0.12500 0.00000 O13 0.50000 0.10900 0.50000