data_global _chemical_name_mineral 'Lepidocrocite' loop_ _publ_author_name 'Ewing F' _journal_name_full 'Journal of Chemical Physics' _journal_volume 3 _journal_year 1935 _journal_page_first 420 _journal_page_last 424 _publ_section_title ; The Crystal Structure of Lepidocrocite _cod_database_code 1011026 ; _database_code_amcsd 0017932 _chemical_formula_sum 'Fe O2' _cell_length_a 3.87 _cell_length_b 12.51 _cell_length_c 3.06 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 148.146 _exptl_crystal_density_diffrn 3.939 _symmetry_space_group_name_H-M 'A m a m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2+y,1/2+z' '1/2+x,-y,z' '1/2+x,1/2-y,1/2+z' '1/2-x,y,-z' '1/2-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' '1/2-x,y,z' '1/2-x,1/2+y,1/2+z' '1/2+x,-y,-z' '1/2+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 Fe1 0.25000 -0.32200 0.00000 O1 0.25000 0.28200 0.00000 O2 0.25000 0.07500 0.00000