data_global _chemical_name_mineral 'Neighborite' loop_ _publ_author_name 'Chakhmouradian A R' 'Ross K' 'Mitchell R H' 'Swainson I' _journal_name_full 'Physics and Chemistry of Minerals' _journal_volume 28 _journal_year 2001 _journal_page_first 277 _journal_page_last 284 _publ_section_title ; The crystal chemistry of synthetic potassium-bearing neighborite, (Na1-xKx)MgF3 Sample studied by X-ray diffraction ; _database_code_amcsd 0008540 _chemical_formula_sum 'Na Mg F3' _cell_length_a 5.3607 _cell_length_b 5.4873 _cell_length_c 7.6662 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 225.507 _exptl_crystal_density_diffrn 3.072 _symmetry_space_group_name_H-M 'P b n m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,y,1/2-z' '-x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-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 _atom_site_U_iso_or_equiv Na 0.98950 0.04410 0.25000 0.02394 Mg 0.00000 0.50000 0.00000 0.01127 F1 0.08970 0.47220 0.25000 0.01482 F2 0.70280 0.29640 0.04760 0.01520