data_global _chemical_name_mineral 'Eitelite' loop_ _publ_author_name 'Pabst A' _journal_name_full 'American Mineralogist' _journal_volume 58 _journal_year 1973 _journal_page_first 211 _journal_page_last 217 _publ_section_title ; The crystallography and structure of eitelite, Na2Mg(CO3)2 ; _database_code_amcsd 0000307 _chemical_formula_sum 'Na2 Mg C2 O6' _cell_length_a 4.942 _cell_length_b 4.942 _cell_length_c 16.406 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 347.007 _exptl_crystal_density_diffrn 2.732 _symmetry_space_group_name_H-M 'R -3' loop_ _space_group_symop_operation_xyz 'x,y,z' '2/3+x,1/3+y,1/3+z' '1/3+x,2/3+y,2/3+z' 'y,-x+y,-z' '2/3+y,1/3-x+y,1/3-z' '1/3+y,2/3-x+y,2/3-z' '-x+y,-x,z' '2/3-x+y,1/3-x,1/3+z' '1/3-x+y,2/3-x,2/3+z' '-x,-y,-z' '2/3-x,1/3-y,1/3-z' '1/3-x,2/3-y,2/3-z' '-y,x-y,z' '2/3-y,1/3+x-y,1/3+z' '1/3-y,2/3+x-y,2/3+z' 'x-y,x,-z' '2/3+x-y,1/3+x,1/3-z' '1/3+x-y,2/3+x,2/3-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Na 0.00000 0.00000 0.19600 0.00507 Mg 0.00000 0.00000 0.00000 0.00507 C 0.00000 0.00000 0.41000 0.00507 O 0.29300 0.09200 0.41000 0.00507