#------------------------------------------------------------------------------ #$Date: 2016-02-20 01:53:41 +0100 (Sat, 20 Feb 2016) $ #$Revision: 176768 $ #$URL: svn://www.crystallography.net/cod/cif/2/10/07/2100721.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/. The original data for this entry # were provided by IUCr Journals, http://journals.iucr.org/. # # The file may be used within the scientific community so long as # proper attribution is given to the journal article from which the # data were obtained. # data_2100721 loop_ _publ_author_name 'Podlozhenov, Sergey' 'Graetsch, Heribert A.' 'Schneider, Julius' 'Ulex, Michael' 'Woehlecke, Manfred' 'Betzler, Klaus' _publ_section_title ; Structure of strontium barium niobate Sr~x~Ba~1{-~x}Nb~2~O~6~ (SBN) in the composition range 0.32 {\/leq} x {\/leq} 0.82 ; _journal_coeditor_code WS5047 _journal_issue 6 _journal_name_full 'Acta Crystallographica Section B' _journal_page_first 960 _journal_page_last 965 _journal_paper_doi 10.1107/S0108768106038869 _journal_volume 62 _journal_year 2006 _chemical_formula_analytical 'Ba0.39 Nb2 O6 Sr0.61' _chemical_formula_moiety 'Ba0.39 Nb2 O6 Sr0.61' _chemical_formula_sum 'Ba0.39 Nb2 O6 Sr0.61' _chemical_formula_weight 388.68 _chemical_name_systematic ; ? ; _space_group_IT_number 100 _symmetry_cell_setting tetragonal _symmetry_space_group_name_Hall 'P 4 -2ab' _symmetry_space_group_name_H-M 'P 4 b m' _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _audit_creation_method SHELXL-97 _cell_angle_alpha 90.00 _cell_angle_beta 90.00 _cell_angle_gamma 90.00 _cell_formula_units_Z 5 _cell_length_a 12.4575(7) _cell_length_b 12.4575(7) _cell_length_c 3.9382(3) _cell_measurement_reflns_used 8284 _cell_measurement_temperature 298(2) _cell_measurement_theta_max 40 _cell_measurement_theta_min 3 _cell_volume 611.17(7) _computing_cell_refinement 'CrysAlisCCD Oxford Diffraction, 2002)' _computing_data_collection 'CrysAlisCCD Oxford Diffraction, 2002)' _computing_data_reduction 'CrysAlisREDOxford Diffraction, 2002)' _computing_publication_material 'WinGX (Farrugia, 1999)' _computing_structure_refinement 'SHELXL-97 (Sheldrick, 1997)' _diffrn_ambient_temperature 298(2) _diffrn_measured_fraction_theta_full 0.997 _diffrn_measured_fraction_theta_max 0.935 _diffrn_measurement_device_type 'Xcalibur CCD' _diffrn_measurement_method '\w and \f' _diffrn_radiation_monochromator graphite _diffrn_radiation_source 'fine-focus sealed tube' _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength 0.71073 _diffrn_reflns_av_R_equivalents 0.0387 _diffrn_reflns_av_sigmaI/netI 0.0373 _diffrn_reflns_limit_h_max 19 _diffrn_reflns_limit_h_min -20 _diffrn_reflns_limit_k_max 22 _diffrn_reflns_limit_k_min -21 _diffrn_reflns_limit_l_max 7 _diffrn_reflns_limit_l_min -7 _diffrn_reflns_number 11458 _diffrn_reflns_theta_full 25.00 _diffrn_reflns_theta_max 39.50 _diffrn_reflns_theta_min 3.27 _diffrn_standards_decay_% 0 _exptl_absorpt_coefficient_mu 14.306 _exptl_absorpt_correction_T_max 0.26710 _exptl_absorpt_correction_T_min 0.12962 _exptl_absorpt_correction_type numerical _exptl_absorpt_process_details 'after shape optimisation' _exptl_crystal_colour colourless _exptl_crystal_density_diffrn 5.282 _exptl_crystal_density_method 'not measured' _exptl_crystal_description sphere _exptl_crystal_F_000 875.3 _exptl_crystal_size_max 0.20 _exptl_crystal_size_mid 0.19 _exptl_crystal_size_min 0.13 _exptl_crystal_size_rad 0.097 _refine_diff_density_max 2.538 _refine_diff_density_min -3.171 _refine_ls_abs_structure_details 'Flack H D (1983), 866 Friedel pairs' _refine_ls_extinction_coef 0.0108(3) _refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^ _refine_ls_extinction_method SHELXL _refine_ls_goodness_of_fit_ref 1.140 _refine_ls_matrix_type full _refine_ls_number_parameters 65 _refine_ls_number_reflns 2096 _refine_ls_number_restraints 2 _refine_ls_restrained_S_all 1.139 _refine_ls_R_factor_all 0.0492 _refine_ls_R_factor_gt 0.0330 _refine_ls_shift/su_max 0.001 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0334P)^2^+0.3182P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.0720 _refine_ls_wR_factor_ref 0.0758 _reflns_number_gt 1740 _reflns_number_total 2096 _reflns_threshold_expression >2sigma(I) _cod_data_source_file ws5047.cif _cod_data_source_block shape137 _cod_database_code 2100721 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x+1/2, y+1/2, z' '-x, -y, z' 'x+1/2, -y+1/2, z' '-y+1/2, -x+1/2, z' 'y, -x, z' '-y, x, z' 'y+1/2, x+1/2, z' loop_ _atom_site_type_symbol _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv _atom_site_adp_type _atom_site_calc_flag _atom_site_refinement_flags _atom_site_occupancy Ba Ba2 0.17220(2) 0.67220(2) 0.49522(13) 0.02736(7) Uani d SP 0.4877(8) Sr Sr2 0.17220(2) 0.67220(2) 0.49522(13) 0.02736(7) Uani d SP 0.4037(8) Sr Sr1 0.0000 0.0000 0.48961(18) 0.00856(10) Uani d SP 0.7180(12) Nb Nb1 0.5000 0.0000 0.01794(12) 0.00900(6) Uani d S 1 Nb Nb2 0.074489(15) 0.211482(15) -0.00035(8) 0.01067(3) Uani d . 1 O O1 0.28227(15) 0.78227(15) 0.9698(10) 0.0189(6) Uani d S 1 O O2 0.13869(17) 0.06946(15) 0.9619(9) 0.0316(7) Uani d . 1 O O3 0.99311(16) 0.34320(15) 0.9664(10) 0.0357(7) Uani d . 1 O O4 0.5000 0.0000 0.4752(12) 0.0579(18) Uani d S 1 O O5 0.0761(3) 0.2035(2) 0.4694(6) 0.0553(9) Uani d . 1 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 Ba2 0.03294(9) 0.03294(9) 0.01620(11) -0.01996(12) -0.00053(17) -0.00053(17) Sr2 0.03294(9) 0.03294(9) 0.01620(11) -0.01996(12) -0.00053(17) -0.00053(17) Sr1 0.00828(12) 0.00828(12) 0.0091(2) 0.000 0.000 0.000 Nb1 0.00954(8) 0.00954(8) 0.00790(12) 0.00050(11) 0.000 0.000 Nb2 0.01037(7) 0.00940(7) 0.01224(7) 0.00135(6) -0.00012(15) -0.00108(17) O1 0.0128(6) 0.0128(6) 0.0311(17) 0.0056(8) 0.0006(11) 0.0006(11) O2 0.0198(8) 0.0102(7) 0.0649(19) 0.0055(6) -0.0144(15) -0.0115(14) O3 0.0188(9) 0.0094(7) 0.079(2) 0.0055(7) -0.006(2) -0.0099(15) O4 0.085(3) 0.085(3) 0.0045(19) -0.017(4) 0.000 0.000 O5 0.124(3) 0.0391(12) 0.0030(10) -0.0406(14) 0.0047(13) 0.0007(10) loop_ _atom_type_symbol _atom_type_description _atom_type_scat_dispersion_real _atom_type_scat_dispersion_imag _atom_type_scat_source Ba Ba -0.3244 2.2819 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' Nb Nb -2.0727 0.6215 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' Sr Sr -1.5307 3.2498 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' loop_ _geom_angle_atom_site_label_1 _geom_angle_atom_site_label_2 _geom_angle_atom_site_label_3 _geom_angle_site_symmetry_1 _geom_angle_site_symmetry_3 _geom_angle O1 Ba2 O3 . 3_665 87.11(9) O1 Ba2 O3 . 5_565 87.11(9) O3 Ba2 O3 3_665 5_565 56.77(9) O1 Ba2 O1 . 1_554 90.76(8) O3 Ba2 O1 3_665 1_554 151.51(4) O3 Ba2 O1 5_565 1_554 151.51(4) O1 Ba2 O3 . 3_664 151.98(4) O3 Ba2 O3 3_665 3_664 87.06(6) O3 Ba2 O3 5_565 3_664 112.12(7) O1 Ba2 O3 1_554 3_664 81.59(8) O1 Ba2 O3 . 5_564 151.98(4) O3 Ba2 O3 3_665 5_564 112.12(7) O3 Ba2 O3 5_565 5_564 87.06(6) O1 Ba2 O3 1_554 5_564 81.59(8) O3 Ba2 O3 3_664 5_564 53.49(9) O1 Ba2 O4 . 2 137.56(11) O3 Ba2 O4 3_665 2 56.25(9) O3 Ba2 O4 5_565 2 56.25(9) O1 Ba2 O4 1_554 2 131.68(11) O3 Ba2 O4 3_664 2 55.89(9) O3 Ba2 O4 5_564 2 55.89(9) O1 Ba2 O5 . 2 56.93(7) O3 Ba2 O5 3_665 2 139.94(8) O3 Ba2 O5 5_565 2 100.45(6) O1 Ba2 O5 1_554 2 55.74(6) O3 Ba2 O5 3_664 2 132.95(8) O3 Ba2 O5 5_564 2 97.39(6) O4 Ba2 O5 2 2 141.95(5) O1 Ba2 O5 . 6_565 56.93(6) O3 Ba2 O5 3_665 6_565 100.45(6) O3 Ba2 O5 5_565 6_565 139.94(8) O1 Ba2 O5 1_554 6_565 55.74(6) O3 Ba2 O5 3_664 6_565 97.39(6) O3 Ba2 O5 5_564 6_565 132.95(8) O4 Ba2 O5 2 6_565 141.95(5) O5 Ba2 O5 2 6_565 75.78(9) O1 Ba2 O2 . 6_565 55.89(5) O3 Ba2 O2 3_665 6_565 51.74(6) O3 Ba2 O2 5_565 6_565 97.64(8) O1 Ba2 O2 1_554 6_565 104.60(6) O3 Ba2 O2 3_664 6_565 99.90(7) O3 Ba2 O2 5_564 6_565 152.12(5) O4 Ba2 O2 2 6_565 104.40(6) O5 Ba2 O2 2 6_565 108.63(6) O5 Ba2 O2 6_565 6_565 49.29(6) O1 Ba2 O2 . 2 55.89(5) O3 Ba2 O2 3_665 2 97.64(8) O3 Ba2 O2 5_565 2 51.74(6) O1 Ba2 O2 1_554 2 104.60(6) O3 Ba2 O2 3_664 2 152.12(5) O3 Ba2 O2 5_564 2 99.90(7) O4 Ba2 O2 2 2 104.40(6) O5 Ba2 O2 2 2 49.29(6) O5 Ba2 O2 6_565 2 108.63(6) O2 Ba2 O2 6_565 2 104.57(10) O1 Ba2 Nb1 . 2 167.84(7) O3 Ba2 Nb1 3_665 2 82.19(6) O3 Ba2 Nb1 5_565 2 82.19(6) O1 Ba2 Nb1 1_554 2 101.40(7) O3 Ba2 Nb1 3_664 2 33.42(4) O3 Ba2 Nb1 5_564 2 33.42(4) O4 Ba2 Nb1 2 2 30.28(9) O5 Ba2 Nb1 2 2 130.81(5) O5 Ba2 Nb1 6_565 2 130.81(5) O2 Ba2 Nb1 6_565 2 119.77(4) O2 Ba2 Nb1 2 2 119.77(4) O2 Sr1 O2 . 7 61.27(7) O2 Sr1 O2 . 3 92.22(13) O2 Sr1 O2 7 3 61.27(7) O2 Sr1 O2 . 6 61.27(7) O2 Sr1 O2 7 6 92.22(13) O2 Sr1 O2 3 6 61.27(7) O2 Sr1 O5 . 3 123.24(8) O2 Sr1 O5 7 3 120.72(8) O2 Sr1 O5 3 3 59.52(8) O2 Sr1 O5 6 3 61.97(8) O2 Sr1 O5 . 6 61.97(8) O2 Sr1 O5 7 6 123.24(8) O2 Sr1 O5 3 6 120.72(8) O2 Sr1 O5 6 6 59.52(8) O5 Sr1 O5 3 6 89.950(3) O2 Sr1 O5 . . 59.52(8) O2 Sr1 O5 7 . 61.97(8) O2 Sr1 O5 3 . 123.24(8) O2 Sr1 O5 6 . 120.72(8) O5 Sr1 O5 3 . 176.63(10) O5 Sr1 O5 6 . 89.950(3) O2 Sr1 O5 . 7 120.72(8) O2 Sr1 O5 7 7 59.52(8) O2 Sr1 O5 3 7 61.97(8) O2 Sr1 O5 6 7 123.24(8) O5 Sr1 O5 3 7 89.950(3) O5 Sr1 O5 6 7 176.63(10) O5 Sr1 O5 . 7 89.950(3) O2 Sr1 O2 . 3_554 176.83(10) O2 Sr1 O2 7 3_554 120.50(4) O2 Sr1 O2 3 3_554 90.95(6) O2 Sr1 O2 6 3_554 120.50(4) O5 Sr1 O2 3 3_554 58.65(7) O5 Sr1 O2 6 3_554 116.23(8) O5 Sr1 O2 . 3_554 118.50(7) O5 Sr1 O2 7 3_554 60.98(8) O2 Sr1 O2 . 6_554 120.50(4) O2 Sr1 O2 7 6_554 176.83(10) O2 Sr1 O2 3 6_554 120.50(4) O2 Sr1 O2 6 6_554 90.95(6) O5 Sr1 O2 3 6_554 60.98(8) O5 Sr1 O2 6 6_554 58.65(7) O5 Sr1 O2 . 6_554 116.23(8) O5 Sr1 O2 7 6_554 118.50(7) O2 Sr1 O2 3_554 6_554 57.59(7) O2 Sr1 O2 . 7_554 120.50(4) O2 Sr1 O2 7 7_554 90.95(6) O2 Sr1 O2 3 7_554 120.50(4) O2 Sr1 O2 6 7_554 176.83(10) O5 Sr1 O2 3 7_554 116.23(8) O5 Sr1 O2 6 7_554 118.50(7) O5 Sr1 O2 . 7_554 60.98(8) O5 Sr1 O2 7 7_554 58.65(7) O2 Sr1 O2 3_554 7_554 57.59(7) O2 Sr1 O2 6_554 7_554 85.88(11) O2 Sr1 O2 . 1_554 90.95(6) O2 Sr1 O2 7 1_554 120.50(4) O2 Sr1 O2 3 1_554 176.83(10) O2 Sr1 O2 6 1_554 120.50(4) O5 Sr1 O2 3 1_554 118.50(7) O5 Sr1 O2 6 1_554 60.98(8) O5 Sr1 O2 . 1_554 58.64(7) O5 Sr1 O2 7 1_554 116.23(8) O2 Sr1 O2 3_554 1_554 85.88(11) O2 Sr1 O2 6_554 1_554 57.59(7) O2 Sr1 O2 7_554 1_554 57.59(7) O4 Nb1 O3 . 6_564 95.93(11) O4 Nb1 O3 . 2_644 95.93(11) O3 Nb1 O3 6_564 2_644 94.36(12) O4 Nb1 O3 . 7_644 95.93(11) O3 Nb1 O3 6_564 7_644 168.1(2) O3 Nb1 O3 2_644 7_644 84.41(12) O4 Nb1 O3 . 4_454 95.93(11) O3 Nb1 O3 6_564 4_454 84.41(12) O3 Nb1 O3 2_644 4_454 168.1(2) O3 Nb1 O3 7_644 4_454 94.36(12) O4 Nb1 O4 . 1_554 180.0 O3 Nb1 O4 6_564 1_554 84.07(11) O3 Nb1 O4 2_644 1_554 84.07(11) O3 Nb1 O4 7_644 1_554 84.07(11) O3 Nb1 O4 4_454 1_554 84.07(11) O4 Nb1 Ba2 . 4 58.22(4) O3 Nb1 Ba2 6_564 4 132.69(8) O3 Nb1 Ba2 2_644 4 55.30(9) O3 Nb1 Ba2 7_644 4 55.30(9) O3 Nb1 Ba2 4_454 4 132.69(8) O4 Nb1 Ba2 1_554 4 121.78(2) O4 Nb1 Sr2 . 4 58.22(2) O3 Nb1 Sr2 6_564 4 132.69(8) O3 Nb1 Sr2 2_644 4 55.30(9) O3 Nb1 Sr2 7_644 4 55.30(9) O3 Nb1 Sr2 4_454 4 132.69(8) O4 Nb1 Sr2 1_554 4 121.78(2) O4 Nb1 Sr2 . 2_545 58.22(2) O3 Nb1 Sr2 6_564 2_545 55.30(9) O3 Nb1 Sr2 2_644 2_545 132.69(8) O3 Nb1 Sr2 7_644 2_545 132.69(8) O3 Nb1 Sr2 4_454 2_545 55.30(9) O4 Nb1 Sr2 1_554 2_545 121.78(2) Ba2 Nb1 Sr2 4 2_545 116.44(3) Sr2 Nb1 Sr2 4 2_545 116.44(3) O4 Nb1 Ba2 . 2_545 58.22(2) O3 Nb1 Ba2 6_564 2_545 55.30(9) O3 Nb1 Ba2 2_644 2_545 132.69(8) O3 Nb1 Ba2 7_644 2_545 132.69(8) O3 Nb1 Ba2 4_454 2_545 55.30(9) O4 Nb1 Ba2 1_554 2_545 121.78(2) Ba2 Nb1 Ba2 4 2_545 116.44(3) Sr2 Nb1 Ba2 4 2_545 116.44(3) O4 Nb1 Ba2 . 4_554 124.16(2) O3 Nb1 Ba2 6_564 4_554 123.31(9) O3 Nb1 Ba2 2_644 4_554 48.31(9) O3 Nb1 Ba2 7_644 4_554 48.31(9) O3 Nb1 Ba2 4_454 4_554 123.31(9) O4 Nb1 Ba2 1_554 4_554 55.84(2) Ba2 Nb1 Ba2 4 4_554 65.94(2) Sr2 Nb1 Ba2 4 4_554 65.94(2) Sr2 Nb1 Ba2 2_545 4_554 177.622(19) Ba2 Nb1 Ba2 2_545 4_554 177.622(19) O4 Nb1 Sr2 . 4_554 124.16(2) O3 Nb1 Sr2 6_564 4_554 123.31(9) O3 Nb1 Sr2 2_644 4_554 48.31(9) O3 Nb1 Sr2 7_644 4_554 48.31(9) O3 Nb1 Sr2 4_454 4_554 123.31(9) O4 Nb1 Sr2 1_554 4_554 55.84(2) Ba2 Nb1 Sr2 4 4_554 65.94(2) Sr2 Nb1 Sr2 4 4_554 65.94(2) Sr2 Nb1 Sr2 2_545 4_554 177.622(19) Ba2 Nb1 Sr2 2_545 4_554 177.622(19) O5 Nb2 O3 . 1_454 96.82(15) O5 Nb2 O2 . 1_554 91.31(14) O3 Nb2 O2 1_454 1_554 168.93(13) O5 Nb2 O1 . 2_544 94.19(15) O3 Nb2 O1 1_454 2_544 95.16(9) O2 Nb2 O1 1_554 2_544 91.70(9) O5 Nb2 O2 . 7_554 93.37(14) O3 Nb2 O2 1_454 7_554 84.85(8) O2 Nb2 O2 1_554 7_554 87.19(12) O1 Nb2 O2 2_544 7_554 172.39(14) O5 Nb2 O5 . 1_554 174.08(16) O3 Nb2 O5 1_454 1_554 88.72(14) O2 Nb2 O5 1_554 1_554 82.92(13) O1 Nb2 O5 2_544 1_554 87.36(13) O2 Nb2 O5 7_554 1_554 85.03(13) O5 Nb2 Sr1 . . 52.69(8) O3 Nb2 Sr1 1_454 . 123.64(9) O2 Nb2 Sr1 1_554 . 56.66(9) O1 Nb2 Sr1 2_544 . 128.42(9) O2 Nb2 Sr1 7_554 . 56.58(9) O5 Nb2 Sr1 1_554 . 122.21(7) O5 Nb2 Sr1 . 1_554 122.98(8) O3 Nb2 Sr1 1_454 1_554 117.98(9) O2 Nb2 Sr1 1_554 1_554 50.98(8) O1 Nb2 Sr1 2_544 1_554 123.08(9) O2 Nb2 Sr1 7_554 1_554 51.11(8) O5 Nb2 Sr1 1_554 1_554 51.92(7) Sr1 Nb2 Sr1 . 1_554 70.36(3) O5 Nb2 Ba2 . 2_545 57.56(11) O3 Nb2 Ba2 1_454 2_545 126.05(8) O2 Nb2 Ba2 1_554 2_545 64.82(8) O1 Nb2 Ba2 2_544 2_545 48.22(9) O2 Nb2 Ba2 7_554 2_545 136.89(8) O5 Nb2 Ba2 1_554 2_545 120.43(10) Sr1 Nb2 Ba2 . 2_545 80.36(2) Sr1 Nb2 Ba2 1_554 2_545 115.58(2) O5 Nb2 Sr2 . 2_545 57.56(11) O3 Nb2 Sr2 1_454 2_545 126.05(8) O2 Nb2 Sr2 1_554 2_545 64.82(8) O1 Nb2 Sr2 2_544 2_545 48.22(9) O2 Nb2 Sr2 7_554 2_545 136.89(8) O5 Nb2 Sr2 1_554 2_545 120.43(10) Sr1 Nb2 Sr2 . 2_545 80.36(2) Sr1 Nb2 Sr2 1_554 2_545 115.58(2) O5 Nb2 Sr2 . 2_544 120.75(11) O3 Nb2 Sr2 1_454 2_544 120.98(9) O2 Nb2 Sr2 1_554 2_544 59.79(8) O1 Nb2 Sr2 2_544 2_544 43.57(9) O2 Nb2 Sr2 7_554 2_544 130.50(8) O5 Nb2 Sr2 1_554 2_544 57.22(10) Sr1 Nb2 Sr2 . 2_544 115.38(2) Sr1 Nb2 Sr2 1_554 2_544 79.53(2) Ba2 Nb2 Sr2 2_545 2_544 63.32(3) Sr2 Nb2 Sr2 2_545 2_544 63.32(3) O5 Nb2 Ba2 . 2_544 120.75(11) O3 Nb2 Ba2 1_454 2_544 120.98(9) O2 Nb2 Ba2 1_554 2_544 59.79(8) O1 Nb2 Ba2 2_544 2_544 43.57(9) O2 Nb2 Ba2 7_554 2_544 130.50(8) O5 Nb2 Ba2 1_554 2_544 57.22(10) Sr1 Nb2 Ba2 . 2_544 115.38(2) Sr1 Nb2 Ba2 1_554 2_544 79.53(2) Ba2 Nb2 Ba2 2_545 2_544 63.32(3) Sr2 Nb2 Ba2 2_545 2_544 63.32(3) Nb2 O1 Nb2 6_566 2_556 142.01(14) Nb2 O1 Ba2 6_566 . 105.75(10) Nb2 O1 Ba2 2_556 . 105.75(10) Nb2 O1 Ba2 6_566 1_556 100.14(10) Nb2 O1 Ba2 2_556 1_556 100.14(10) Ba2 O1 Ba2 . 1_556 90.76(8) Nb2 O1 Sr2 6_566 1_556 100.14(10) Nb2 O1 Sr2 2_556 1_556 100.14(10) Ba2 O1 Sr2 . 1_556 90.76(8) Nb2 O2 Nb2 1_556 6_556 171.05(19) Nb2 O2 Sr1 1_556 . 94.67(9) Nb2 O2 Sr1 6_556 . 93.09(8) Nb2 O2 Sr1 1_556 1_556 88.35(10) Nb2 O2 Sr1 6_556 1_556 87.06(9) Sr1 O2 Sr1 . 1_556 90.95(6) Nb2 O2 Ba2 1_556 2_545 89.03(8) Nb2 O2 Ba2 6_556 2_545 93.78(9) Sr1 O2 Ba2 . 2_545 101.67(11) Sr1 O2 Ba2 1_556 2_545 167.27(11) Nb2 O2 Sr2 1_556 2_545 89.03(8) Nb2 O2 Sr2 6_556 2_545 93.78(9) Sr1 O2 Sr2 . 2_545 101.67(11) Sr1 O2 Sr2 1_556 2_545 167.27(11) Nb2 O3 Nb1 1_656 2_656 144.44(12) Nb2 O3 Ba2 1_656 3_665 112.05(11) Nb1 O3 Ba2 2_656 3_665 99.78(10) Nb2 O3 Sr2 1_656 3_665 112.05(11) Nb1 O3 Sr2 2_656 3_665 99.78(10) Nb2 O3 Sr2 1_656 3_666 105.34(12) Nb1 O3 Sr2 2_656 3_666 91.28(10) Ba2 O3 Sr2 3_665 3_666 87.06(6) Sr2 O3 Sr2 3_665 3_666 87.06(6) Nb2 O3 Ba2 1_656 3_666 105.34(12) Nb1 O3 Ba2 2_656 3_666 91.28(10) Ba2 O3 Ba2 3_665 3_666 87.06(6) Sr2 O3 Ba2 3_665 3_666 87.06(6) Nb1 O4 Nb1 . 1_556 180.0 Nb1 O4 Sr2 . 4 91.49(9) Nb1 O4 Sr2 1_556 4 88.51(9) Nb1 O4 Ba2 . 4 91.49(9) Nb1 O4 Ba2 1_556 4 88.51(9) Nb1 O4 Ba2 . 2_545 91.49(9) Nb1 O4 Ba2 1_556 2_545 88.51(9) Sr2 O4 Ba2 4 2_545 177.02(18) Ba2 O4 Ba2 4 2_545 177.02(18) Nb1 O4 Sr2 . 2_545 91.49(9) Nb1 O4 Sr2 1_556 2_545 88.51(9) Sr2 O4 Sr2 4 2_545 177.02(18) Ba2 O4 Sr2 4 2_545 177.02(18) Nb2 O5 Nb2 . 1_556 174.08(16) Nb2 O5 Sr1 . . 94.36(10) Nb2 O5 Sr1 1_556 . 90.68(9) Nb2 O5 Ba2 . 2_545 92.83(12) Nb2 O5 Ba2 1_556 2_545 89.03(10) Sr1 O5 Ba2 . 2_545 103.34(10) Nb2 O5 Sr2 . 2_545 92.83(12) Nb2 O5 Sr2 1_556 2_545 89.03(10) Sr1 O5 Sr2 . 2_545 103.34(10) loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_site_symmetry_2 _geom_bond_distance Ba2 O1 . 2.693(3) Ba2 O3 3_665 2.778(3) Ba2 O3 5_565 2.778(3) Ba2 O1 1_554 2.835(3) Ba2 O3 3_664 2.935(3) Ba2 O3 5_564 2.935(3) Ba2 O4 2 3.0351(4) Ba2 O5 2 3.162(4) Ba2 O5 6_565 3.162(4) Ba2 O2 6_565 3.250(3) Ba2 O2 2 3.250(3) Ba2 Nb1 2 3.5685(6) Sr1 O2 . 2.682(3) Sr1 O2 7 2.682(3) Sr1 O2 3 2.682(3) Sr1 O2 6 2.682(3) Sr1 O5 3 2.708(3) Sr1 O5 6 2.708(3) Sr1 O5 . 2.708(3) Sr1 O5 7 2.708(3) Sr1 O2 3_554 2.837(3) Sr1 O2 6_554 2.837(3) Sr1 O2 7_554 2.837(3) Sr1 O2 1_554 2.837(3) Nb1 O4 . 1.800(5) Nb1 O3 6_564 1.9659(19) Nb1 O3 2_644 1.9659(19) Nb1 O3 7_644 1.9659(19) Nb1 O3 4_454 1.9659(19) Nb1 O4 1_554 2.136(5) Nb1 Ba2 4 3.5685(6) Nb1 Sr2 4 3.5685(6) Nb1 Sr2 2_545 3.5685(6) Nb1 Ba2 2_545 3.5685(6) Nb1 Ba2 4_554 3.6658(6) Nb1 Sr2 4_554 3.6658(6) Nb2 O5 . 1.852(2) Nb2 O3 1_454 1.9335(19) Nb2 O2 1_554 1.9475(19) Nb2 O1 2_544 1.9941(19) Nb2 O2 7_554 2.0152(19) Nb2 O5 1_554 2.090(2) Nb2 Sr1 1_554 3.4400(6) Nb2 Ba2 2_545 3.7423(5) Nb2 Sr2 2_545 3.7423(5) Nb2 Sr2 2_544 3.7606(5) Nb2 Ba2 2_544 3.7606(5) O1 Nb2 6_566 1.9941(19) O1 Nb2 2_556 1.9941(19) O1 Ba2 1_556 2.835(3) O1 Sr2 1_556 2.835(3) O2 Nb2 1_556 1.9475(19) O2 Nb2 6_556 2.0152(19) O2 Sr1 1_556 2.837(3) O2 Ba2 2_545 3.250(3) O2 Sr2 2_545 3.250(3) O3 Nb2 1_656 1.9335(19) O3 Nb1 2_656 1.9659(19) O3 Ba2 3_665 2.778(3) O3 Sr2 3_665 2.778(3) O3 Sr2 3_666 2.935(3) O3 Ba2 3_666 2.935(3) O4 Nb1 1_556 2.136(5) O4 Sr2 4 3.0351(4) O4 Ba2 4 3.0351(4) O4 Ba2 2_545 3.0351(4) O4 Sr2 2_545 3.0351(4) O5 Nb2 1_556 2.090(2) O5 Ba2 2_545 3.162(4) O5 Sr2 2_545 3.162(4)