data_global _amcsd_formula_title '(NH4)2S2O8' loop_ _publ_author_name 'Zachariasen W H' 'Mooney R C L' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 88 _journal_year 1934 _journal_page_first 63 _journal_page_last 81 _publ_section_title ; The atomic arrangement in ammonium and caesium persulphate (NH4)2S2O8 and Cs2S2O8, and the structure of the persulphate group ; _database_code_amcsd 0010520 _chemical_formula_sum 'N S O4' _cell_length_a 7.83 _cell_length_b 8.04 _cell_length_c 6.13 _cell_angle_alpha 90 _cell_angle_beta 95.15 _cell_angle_gamma 90 _cell_volume 384.345 _exptl_crystal_density_diffrn 1.902 _symmetry_space_group_name_H-M 'P 1 21/n 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z N 0.14400 0.12500 0.25000 S 0.13600 0.35000 0.70800 O1 0.04200 0.50000 0.61100 O2 0.02800 0.19400 0.68100 O3 0.20800 0.41700 0.93100 O4 0.29200 0.34700 0.59700