data_global _chemical_name_mineral 'Oxammite' loop_ _publ_author_name 'Hendriks S' 'Jefferson M' _journal_name_full 'Journal of Chemical Physics' _journal_volume 4 _journal_year 1936 _journal_page_first 102 _journal_page_last 107 _publ_section_title ; Electron distribution in (N H4)2 (C2 O4) . (H2 O) and the structure of the oxalate group _cod_database_code 1011115 ; _database_code_amcsd 0018010 _chemical_formula_sum 'C2 O5 N2 H2' _cell_length_a 8.04 _cell_length_b 10.27 _cell_length_c 3.82 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 315.420 _exptl_crystal_density_diffrn 1.411 _symmetry_space_group_name_H-M 'P 21 21 2' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-x,1/2+y,-z' '1/2+x,1/2-y,-z' '-x,-y,z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z C1 0.09200 0.02700 0.07000 O1 0.20000 -0.05600 0.14000 O2 0.11800 0.14200 0.00000 N1 0.38600 0.22800 0.43000 Wat3 0.00000 0.50000 0.20000