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 1001758 ; _database_code_amcsd 0015007 _chemical_formula_sum 'Tl.5 Pb.5 Sr3 Fe2 O8' _cell_length_a 3.81002 _cell_length_b 3.81002 _cell_length_c 12.7964 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 185.756 _exptl_crystal_density_diffrn 6.332 _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 0.07800 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 0.20090 1.00000 Fe1 0.00000 0.00000 0.35000 1.00000 O1 0.38060 0.50000 0.00000 0.25000 O2 0.00000 0.00000 0.16290 0.48000 O3 0.00000 0.00000 0.15070 0.52000 O4 0.00000 0.00000 0.50000 1.00000 O5 0.00000 0.50000 0.33590 1.00000