data_global _chemical_name_mineral 'Stronalsite' loop_ _publ_author_name 'Liferovich R P' 'Locock A J' 'Mitchell R H' 'Shpachenko A K' _journal_name_full 'The Canadian Mineralogist' _journal_volume 44 _journal_year 2006 _journal_page_first 533 _journal_page_last 546 _publ_section_title ; The crystal structure of stronalsite and a redetermination of the structure of banalsite ; _database_code_amcsd 0006093 _chemical_compound_source 'Khibina peralkaline complex, Kola alkaline province, Russia' _chemical_formula_sum 'Sr Na2 Al4 Si4 O16' _cell_length_a 8.4080 _cell_length_b 9.8699 _cell_length_c 16.7083 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1386.557 _exptl_crystal_density_diffrn 2.921 _symmetry_space_group_name_H-M 'I b a 2' 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' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Sr 0.00000 0.50000 0.15410 0.01690 Na -0.04300 0.32440 -0.09550 0.02150 Al1 0.06930 0.19120 0.06350 0.01150 Al2 -0.27710 0.45070 0.31060 0.01050 Si1 -0.26310 0.55460 -0.00170 0.01080 Si2 0.07700 0.80090 0.24570 0.01010 O1 -0.21540 0.49110 0.40790 0.01610 O2 -0.00230 0.21540 0.15930 0.01830 O3 -0.07760 0.14270 -0.00400 0.01390 O4 0.22480 0.90640 0.24880 0.01420 O5 0.22780 0.07600 0.05710 0.01560 O6 -0.44850 0.35340 0.31000 0.01500 O7 0.12180 0.64720 0.27200 0.01640 O8 -0.11550 0.64390 0.03270 0.01340