data_global _chemical_name_mineral 'Neighborite' loop_ _publ_author_name 'Zhao Y S' 'Parise J B' 'Wang Y' 'Kusaba K' 'Vaughan M T' 'Weidner D J' 'Kikegawa T' 'Chen J' 'Shimomura O' _journal_name_full 'American Mineralogist' _journal_volume 79 _journal_year 1994 _journal_page_first 615 _journal_page_last 621 _publ_section_title ; High-pressure crystal chemistry of neighborite, NaMgF3: an angle-dispersive diffraction study using monochromatic synchrotron X-radiation P = room pressure ; _database_code_amcsd 0001664 _chemical_formula_sum 'Na Mg F3' _cell_length_a 5.3603 _cell_length_b 5.4884 _cell_length_c 7.666 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 225.530 _exptl_crystal_density_diffrn 3.071 _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 0.98510 0.04550 0.25000 0.04200 Mg 0.00000 0.50000 0.00000 0.02600 F1 0.08800 0.47400 0.25000 0.03300 F2 0.70220 0.29460 0.04800 0.03200