data_global _amcsd_formula_title 'K2 O8 S2' loop_ _publ_author_name 'Keen R' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 91 _journal_year 1935 _journal_page_first 129 _journal_page_last 135 _publ_section_title ; The Crystal Structure of Potassium Persulfate K2 S2 O8 _cod_database_code 1010892 ; _database_code_amcsd 0017620 _chemical_formula_sum 'K O4 S' _cell_length_a 5.1 _cell_length_b 6.83 _cell_length_c 5.4 _cell_angle_alpha 106.9 _cell_angle_beta 90.17 _cell_angle_gamma 102.6 _cell_volume 175.196 _exptl_crystal_density_diffrn 2.562 _symmetry_space_group_name_H-M 'P -1' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z K1 0.18600 0.80600 0.48600 O1 0.08600 0.08900 0.06900 O2 0.30600 0.22800 0.70200 O3 0.53400 0.23600 0.09700 O4 0.21400 0.45000 0.11100 S1 0.25800 0.24100 0.01900