data_global _amcsd_formula_title 'Cs2 Nb4 O11' loop_ _publ_author_name 'Gasperin M' _journal_name_full 'Acta Crystallographica, Section B' _journal_volume 37 _journal_year 1981 _journal_page_first 641 _journal_page_last 643 _publ_section_title ; Structure du Niobate de Cesium Cs2 Nb4 O11 _cod_database_code 1001171 ; _database_code_amcsd 0009732 _chemical_formula_sum 'Cs2 Nb4 O11' _cell_length_a 10.484 _cell_length_b 28.898 _cell_length_c 7.464 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 2261.343 _exptl_crystal_density_diffrn 4.779 _symmetry_space_group_name_H-M 'P 2 n n' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2-z' '1/2+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 Cs1 0.08790 0.07520 -0.00210 Cs2 0.10840 0.30800 -0.00890 Cs3 0.37770 0.07530 0.49830 Cs4 0.35660 0.30820 0.49580 Nb1 0.49390 0.37520 0.00250 Nb2 0.22530 0.18730 0.23090 Nb3 0.74220 0.31060 0.23400 Nb4 0.23090 0.43840 0.24610 Nb5 0.50000 0.00000 0.00000 Nb6 -0.04000 0.00000 0.50000 Nb7 0.47130 0.12600 0.00260 Nb8 0.48530 0.24890 0.00520 Nb9 0.73290 0.06110 0.25260 O1 0.05060 0.31550 0.50190 O2 0.06210 0.05230 0.50050 O3 0.10990 0.49990 0.29320 O4 0.10750 0.13440 0.31060 O5 0.11260 0.23400 0.31990 O6 0.09610 0.40130 0.30680 O7 0.11260 0.13450 0.68730 O8 0.11040 0.23400 0.67980 O9 0.09440 0.40010 0.68970 O10 0.17550 0.18540 0.00110 O11 0.18770 0.44600 -0.00200 O12 0.30160 0.18510 0.49830 O13 0.28520 0.44850 0.50110 O14 0.35890 0.13940 0.17740 O15 0.36150 0.23280 0.18690 O16 0.36340 0.39960 0.18610 O17 0.35800 0.49980 0.19440 O18 0.35370 0.13930 0.82400 O19 0.36520 0.23300 0.81240 O20 0.36350 0.39940 0.81630 O21 0.40720 0.05000 0.00130 O22 0.42540 0.31640 0.00280