data_global _chemical_name_mineral 'Dawsonite' loop_ _publ_author_name 'Frueh A J' 'Golightly J P' _journal_name_full 'The Canadian Mineralogist' _journal_volume 9 _journal_year 1967 _journal_page_first 51 _journal_page_last 56 _publ_section_title ; The crystal structure of dawsonite NaAl(CO3)(OH)2 ; _database_code_amcsd 0005083 _chemical_compound_source 'McGill University, Montreal, Quebec, Canada' _chemical_formula_sum 'Na Al C O5 H2' _cell_length_a 6.710 _cell_length_b 10.411 _cell_length_c 5.58 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 389.807 _exptl_crystal_density_diffrn 2.454 _symmetry_space_group_name_H-M 'I m a m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' 'x,y,1/2-z' '1/2+x,1/2+y,-z' '-x,-y,1/2+z' '1/2-x,1/2-y,+z' '-x,y,z' '1/2-x,1/2+y,1/2+z' 'x,-y,-z' '1/2+x,1/2-y,1/2-z' 'x,-y,1/2+z' '1/2+x,1/2-y,+z' '-x,y,1/2-z' '1/2-x,1/2+y,-z' '-x,-y,-z' '1/2-x,1/2-y,1/2-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Na 0.25000 0.75000 0.25000 0.00038 Al 0.00000 0.50000 0.00000 0.00038 C 0.00000 0.25400 0.25000 0.00038 O1 0.00000 0.13300 0.25000 0.00038 O2 0.00000 0.31500 0.05200 0.00038 O-H 0.18000 0.52500 0.25000 0.00038