data_global _amcsd_formula_title 'NaSr2CrF8' loop_ _publ_author_name 'Hemon A' 'Courbion G' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 87 _journal_year 1990 _journal_page_first 344 _journal_page_last 349 _publ_section_title ; NaSr2CrF8: a new structure with two "independent F" _cod_database_code 1000289 ; _database_code_amcsd 0013680 _chemical_formula_sum 'Sr2 Cr Na F8' _cell_length_a 7.7388 _cell_length_b 6.2756 _cell_length_c 14.827 _cell_angle_alpha 90 _cell_angle_beta 112.03 _cell_angle_gamma 90 _cell_volume 667.507 _exptl_crystal_density_diffrn 4.002 _symmetry_space_group_name_H-M 'P 1 21/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,1/2+z' '-x,1/2+y,1/2-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Sr1 0.09900 0.27654 0.19682 Sr2 0.41468 0.84217 0.35578 Cr1 0.69368 0.27844 0.40287 Na1 0.85530 0.82340 0.05850 F1 0.17460 0.87370 0.17710 F2 0.85460 0.55270 0.15600 F3 0.08240 0.80140 0.98480 F4 0.81470 0.05400 0.17360 F5 0.64580 0.93190 0.91620 F6 0.52660 0.73580 0.21490 F7 0.74560 0.51470 0.88980 F8 0.45310 0.68800 0.02800 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Sr1 0.00990 0.00840 0.00900 -0.00030 0.00400 0.00070 Sr2 0.00810 0.00960 0.00850 0.00080 0.00390 0.00040 Cr1 0.00960 0.00700 0.00600 -0.00050 0.00340 -0.00020 Na1 0.02310 0.02010 0.01390 0.00220 0.00590 0.00420 F1 0.01390 0.01930 0.00970 0.00320 0.00580 -0.00050 F2 0.01070 0.01100 0.01100 -0.00040 0.00360 -0.00010 F3 0.01530 0.01690 0.00820 -0.00020 0.00220 -0.00080 F4 0.01300 0.01340 0.01160 0.00070 0.00480 -0.00030 F5 0.01860 0.00820 0.01890 -0.00420 0.00120 0.00100 F6 0.01170 0.02040 0.01060 0.00240 0.00290 0.00140 F7 0.01640 0.00810 0.02180 -0.00080 0.01140 0.00480 F8 0.01950 0.01890 0.01140 0.00470 0.00970 -0.00060