data_global _chemical_name_mineral 'Crawfordite' loop_ _publ_author_name 'Sokolova E V' 'Khomyakov A P' _journal_name_full 'Doklady Akademii Nauk SSSR' _journal_volume 322 _journal_year 1992 _journal_page_first 531 _journal_page_last 535 _publ_section_title ; Crystal structure of a new mineral Na3SePO4CO3 from bredleyite group ; _database_code_amcsd 0012486 _chemical_formula_sum 'Sr P Na3 C O7' _cell_length_a 9.187 _cell_length_b 5.279 _cell_length_c 6.707 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 89.98 _cell_volume 325.277 _exptl_crystal_density_diffrn 3.181 _symmetry_space_group_name_H-M 'P 1 1 21' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-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 Sr 0.67640 -0.00030 0.25000 0.01393 P 0.33050 -0.00010 0.25400 0.00735 Na1 0.15840 0.49800 0.23600 0.04306 Na2 0.00600 -0.00600 0.00600 0.04179 Na3 0.46580 0.50100 0.45600 0.01646 C 0.15400 0.50800 0.77300 0.03926 O1 0.70500 0.49300 0.27000 0.02280 O2 0.91500 0.29000 0.24600 0.04939 O3 0.23500 0.14300 0.10500 0.02406 O4 0.42700 0.80500 0.15600 0.02786 O5 0.91700 0.71100 0.25500 0.05319 O6 0.42600 0.19700 0.15300 0.01900 O7 0.76200 0.13700 0.91100 0.01520