data_global _amcsd_formula_title 'Fe2 O8 Pb0.5 Sr3 Tl0.5' loop_ _publ_author_name 'Nguyen N' 'Groult D' 'Caignaert V' 'Ducouret A' 'Raveau B' _journal_name_full 'Physica B' _journal_volume 228 _journal_year 1996 _journal_page_first 251 _journal_page_last 260 _publ_section_title ; Neutron diffraction and Mossbauer spectroscopy studies of the mixed valent Tl-1212 ferrite (Tl0.5 Pb0.5) Sr3 Fe2 O8 _cod_database_code 1001757 ; _database_code_amcsd 0015006 _chemical_formula_sum 'Tl.5 Pb.5 Sr3 Fe2 O8' _cell_length_a 3.81474 _cell_length_b 3.81474 _cell_length_c 12.8293 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 186.695 _exptl_crystal_density_diffrn 6.300 _symmetry_space_group_name_H-M 'P 4/m m m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-y,-x,z' 'y,x,-z' 'y,-x,-z' '-y,x,z' 'x,-y,z' '-x,y,-z' 'x,y,-z' '-x,-y,z' 'y,x,z' '-y,-x,-z' '-y,x,-z' 'y,-x,z' '-x,y,z' 'x,-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Tl1 0.07630 0.00000 0.00000 0.12500 Pb1 0.00000 0.00000 0.00000 0.50000 Sr1 0.50000 0.50000 0.50000 1.00000 Sr2 0.50000 0.50000 0.20040 1.00000 Fe1 0.00000 0.00000 0.35000 1.00000 O1 0.38600 0.50000 0.00000 0.25000 O2 0.00000 0.00000 0.15590 1.00000 O3 0.00000 0.00000 0.50000 1.00000 O4 0.00000 0.50000 0.33560 1.00000 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 O2 0.01600 0.01600 0.02400 0.00000 0.00000 0.00000