data_global _amcsd_formula_title 'Cr F6 Na Sr' loop_ _publ_author_name 'Hemon A' 'Courbion G' _journal_name_full 'European Journal of Solid State and Inorganic Chemistry' _journal_volume 29 _journal_year 1992 _journal_page_first 519 _journal_page_last 531 _publ_section_title ; Synthesis and crystal structures of beta-NaSrCrF6 and NaSrFeF6. Structural correlations with A2MF6 compounds _cod_database_code 1000305 ; _database_code_amcsd 0012556 _chemical_formula_sum 'Sr Cr Na F6' _cell_length_a 5.5676 _cell_length_b 9.2937 _cell_length_c 9.5858 _cell_angle_alpha 90 _cell_angle_beta 93.201 _cell_angle_gamma 90 _cell_volume 495.230 _exptl_crystal_density_diffrn 3.710 _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 0.23779 0.82376 0.99032 Cr1 0.23030 0.41834 0.76361 Na1 0.72190 0.54730 0.87840 F1 0.46900 0.47700 0.63980 F2 0.85340 0.76350 0.85530 F3 0.98860 0.36880 0.88600 F4 0.68740 0.41590 0.12490 F5 0.46900 0.18420 0.36890 F6 0.99680 0.52480 0.65100 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 0.01070 0.00840 0.00940 0.00040 0.00050 0.00040 Cr1 0.00860 0.00920 0.00630 0.00030 0.00070 -0.00020 Na1 0.01730 0.01510 0.06240 0.00020 0.00350 0.00280 F1 0.01650 0.02280 0.01770 0.00100 0.01030 0.00290 F2 0.02680 0.01340 0.02130 -0.00350 -0.00990 0.00730 F3 0.02030 0.02210 0.02640 0.00270 0.01480 0.01110 F4 0.01870 0.01680 0.02070 0.00050 0.00090 -0.01000 F5 0.02160 0.02250 0.02570 -0.00480 -0.00840 -0.00560 F6 0.01450 0.01300 0.01410 0.00190 -0.00020 0.00200