data_global _amcsd_formula_title 'O2 Sr' loop_ _publ_author_name 'Bernal J' 'Djatlowa E' 'Kasarnowsky I' 'Reichstein S' 'Ward A' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 92 _journal_year 1935 _journal_page_first 344 _journal_page_last 354 _publ_section_title ; The Structure of Strontium and Barium Peroxides, Sr O2 and Ba O2 _cod_database_code 1010114 ; _database_code_amcsd 0017044 _chemical_formula_sum 'Sr O2' _cell_length_a 3.55 _cell_length_b 3.55 _cell_length_c 6.55 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 82.546 _exptl_crystal_density_diffrn 4.813 _symmetry_space_group_name_H-M 'I 4/m m m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' '-y,-x,z' '1/2-y,1/2-x,1/2+z' 'y,x,-z' '1/2+y,1/2+x,1/2-z' 'y,-x,-z' '1/2+y,1/2-x,1/2-z' '-y,x,z' '1/2-y,1/2+x,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' 'y,x,z' '1/2+y,1/2+x,1/2+z' '-y,-x,-z' '1/2-y,1/2-x,1/2-z' '-y,x,-z' '1/2-y,1/2+x,1/2-z' 'y,-x,z' '1/2+y,1/2-x,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 Sr1 0.00000 0.00000 0.00000 O1 0.00000 0.00000 0.39700