data_global _amcsd_formula_title 'Er2 F7 K' loop_ _publ_author_name 'Aleonard S' 'le Fur Y' 'Gorius M' 'Roux M' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 34 _journal_year 1980 _journal_page_first 79 _journal_page_last 89 _publ_section_title ; Structure cristalline de la phase beta-K Er2 F7. Composes isotypes _cod_database_code 1008834 ; _database_code_amcsd 0016703 _chemical_formula_sum 'K Er2 F7' _cell_length_a 11.82 _cell_length_b 13.333 _cell_length_c 7.816 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1231.771 _exptl_crystal_density_diffrn 5.464 _symmetry_space_group_name_H-M 'P n a 21' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,z' '1/2-x,1/2+y,1/2+z' '-x,-y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z K1 0.08394 0.09501 -0.00083 K2 0.43428 0.06870 -0.02025 Er1 -0.00576 0.74205 0.00771 Er2 0.25564 0.33715 0.78143 Er3 0.24307 0.83579 0.73383 Er4 0.20963 0.06215 0.50825 F1 0.16160 0.42040 0.00760 F2 0.17440 0.20210 0.66190 F3 0.28310 0.50160 0.27210 F4 0.22040 0.00280 0.24210 F5 0.24310 0.23380 0.00960 F6 0.36470 0.40440 0.00260 F7 0.31240 0.33740 0.51320 F8 0.42890 0.26790 0.76560 F9 0.08870 0.36990 0.68280 F10 0.37640 0.12450 0.50890 F11 0.02450 0.08860 0.49250 F12 0.16400 0.19630 0.33420 F13 0.42520 0.26600 0.25890 F14 0.08510 0.38430 0.33690