data_global _amcsd_formula_title 'Fe2 Hg0.3 O9 Pr0.57 Sr4' loop_ _publ_author_name 'Boullay P' 'Domenges B' 'Groult D' 'Raveau B' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 124 _journal_year 1996 _journal_page_first 1 _journal_page_last 7 _publ_section_title ; A mercury-based ferrite with a 0201-1201 structure: (Hg, Pr) Sr4 Fe2 O9 _cod_database_code 1001740 ; _database_code_amcsd 0013892 _chemical_formula_sum 'Hg.3 Pr.57 Sr4 Fe2 O9' _cell_length_a 3.8174 _cell_length_b 3.8138 _cell_length_c 30.33899 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 441.699 _exptl_crystal_density_diffrn 5.614 _symmetry_space_group_name_H-M 'I m m m' loop_ _space_group_symop_operation_xyz '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' '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' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Hg1 0.00000 0.00000 0.00000 0.30000 Pr1 0.00000 0.00000 0.00000 0.57000 Sr1 0.50000 0.50000 0.08390 1.00000 Sr2 0.50000 0.50000 0.20540 1.00000 Fe1 0.00000 0.00000 0.14760 1.00000 O1 0.19000 0.00000 0.50000 0.50000 O2 0.00000 0.00000 0.07100 1.00000 O3 0.50000 0.00000 0.14120 1.00000 O4 0.00000 0.50000 0.14120 1.00000 O5 0.00000 0.00000 0.21400 1.00000