data_global _chemical_name_mineral 'Thenardite' loop_ _publ_author_name 'Zachariasen W' 'Ziegler G' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 81 _journal_year 1932 _journal_page_first 92 _journal_page_last 101 _publ_section_title ; The crystal structure of anhydrous sodium sulfate Na2 S O4 _cod_database_code 1011184 ; _database_code_amcsd 0018059 _chemical_formula_sum 'S Na2 O4' _cell_length_a 5.85 _cell_length_b 12.29 _cell_length_c 9.75 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 700.991 _exptl_crystal_density_diffrn 2.692 _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 S1 0.12500 0.12500 0.12500 Na1 0.12500 0.12500 0.43600 O1 -0.02200 0.05600 0.21400