data_global _amcsd_formula_title 'Ag2 H2 O7 P2' loop_ _publ_author_name 'Averbuch-Pouchot M' 'Durif A' _journal_name_full 'European Journal of Solid State and Inorganic Chemistry' _journal_volume 29 _journal_year 1992 _journal_page_first 993 _journal_page_last 999 _publ_section_title ; Crystal structure of silver-dihydrogeno-diphospate: Ag2H2P2O7 _cod_database_code 1007207 ; _database_code_amcsd 0012558 _chemical_formula_sum 'Ag2 P2 O7 H2' _cell_length_a 27.779 _cell_length_b 12.385 _cell_length_c 7.026 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 2417.246 _exptl_crystal_density_diffrn 4.305 _symmetry_space_group_name_H-M 'F d d d' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2+y,1/2+z' '1/2+x,y,1/2+z' '1/2+x,1/2+y,z' '3/4+x,-y,3/4+z' '3/4+x,1/2-y,1/4+z' '1/4+x,-y,1/4+z' '1/4+x,1/2-y,3/4+z' '3/4-x,y,3/4-z' '3/4-x,1/2+y,1/4-z' '1/4-x,y,1/4-z' '1/4-x,1/2+y,3/4-z' '-x,3/4+y,3/4+z' '-x,1/4+y,1/4+z' '1/2-x,3/4+y,1/4+z' '1/2-x,1/4+y,3/4+z' 'x,3/4-y,3/4-z' 'x,1/4-y,1/4-z' '1/2+x,3/4-y,1/4-z' '1/2+x,1/4-y,3/4-z' '3/4+x,3/4+y,-z' '3/4+x,1/4+y,1/2-z' '1/4+x,3/4+y,1/2-z' '1/4+x,1/4+y,-z' '3/4-x,3/4-y,z' '3/4-x,1/4-y,1/2+z' '1/4-x,3/4-y,1/2+z' '1/4-x,1/4-y,z' '-x,-y,-z' '-x,1/2-y,1/2-z' '1/2-x,-y,1/2-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Ag1 0.42455 0.26780 0.52474 P1 0.94754 0.01972 0.71690 O1 0.47130 0.12500 0.12500 O2 0.50790 0.20610 0.52620 O3 0.33110 0.05640 0.35680 O4 0.16640 0.71530 -0.07320 H1 0.01200 0.12500 0.12500 H2 0.12500 0.95000 0.12500