#------------------------------------------------------------------------------ #$Date: 2011-09-10 04:16:28 +0100 (Sat, 10 Sep 2011) $ #$Revision: 25271 $ #$URL: svn://www.crystallography.net/cod/cif/2/2002914.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_2002914 loop_ _publ_author_name 'Thomas, P. A.' 'Womersley, M. N.' _publ_section_title ; Investigation of the Cs~x~Rb~1{-~x}TiOAsO~4~ Series. II. The Problems of Interpretation of Residual Electron Densities in a Polar Space Group ; _journal_issue 5 _journal_name_full 'Acta Crystallographica Section B' _journal_page_first 645 _journal_page_last 651 _journal_volume 54 _journal_year 1998 _chemical_formula_sum 'As2 Cs1.8 O10 Rb0.16 Ti2' _chemical_formula_weight 661.96 _chemical_name_systematic ; Cs(0.9)Rb(0.1)TiOAsO4 ; _space_group_IT_number 33 _symmetry_cell_setting orthorhombic _symmetry_space_group_name_Hall 'P 2c -2n' _symmetry_space_group_name_H-M 'P n a 21' _audit_creation_method SHELXL93 _cell_angle_alpha 90.00 _cell_angle_beta 90.00 _cell_angle_gamma 90.00 _cell_formula_units_Z 4 _cell_length_a 13.466(3) _cell_length_b 6.8370(8) _cell_length_c 10.704(2) _cell_measurement_reflns_used 119 _cell_measurement_temperature 293(2) _cell_measurement_theta_max 28 _cell_measurement_theta_min 0 _cell_volume 985.5(3) _computing_cell_refinement ' Siemens SMART CCD ' _computing_data_collection ' Siemens SMART CCD ' _computing_data_reduction ' CRYSTALS Issue 10 (Watkin et al., 1996) ' _computing_molecular_graphics 'CAMERON (Watkin, Prout & Pearce, 1996)' _computing_publication_material 'SHELXL-93 (Sheldrick, 1993)' _computing_structure_refinement 'SHELXL-93 (Sheldrick, 1993)' _computing_structure_solution 'SHELXL-93 (Sheldrick, 1993)' _diffrn_ambient_temperature 293(2) _diffrn_detector_area_resol_mean 512 _diffrn_measurement_device ' Siemens SMART CCD ' _diffrn_measurement_method 'Area detector' _diffrn_radiation_monochromator graphite _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength 0.71073 _diffrn_reflns_av_R_equivalents 0.038 _diffrn_reflns_av_sigmaI/netI 0.0375 _diffrn_reflns_limit_h_max 24 _diffrn_reflns_limit_h_min -24 _diffrn_reflns_limit_k_max 12 _diffrn_reflns_limit_k_min -12 _diffrn_reflns_limit_l_max 19 _diffrn_reflns_limit_l_min -19 _diffrn_reflns_number 23595 _diffrn_reflns_theta_max 41 _diffrn_reflns_theta_min 3.03 _diffrn_standards_decay_% 0 _diffrn_standards_interval_count 23595 _diffrn_standards_interval_time 3600 _diffrn_standards_number 100 _exptl_absorpt_coefficient_mu 15.86 _exptl_absorpt_correction_T_max 0.1733 _exptl_absorpt_correction_T_min 0.1388 _exptl_absorpt_correction_type spherical _exptl_crystal_colour 'Colourless ' _exptl_crystal_density_diffrn 4.45 _exptl_crystal_description sphere _exptl_crystal_F_000 1186 _exptl_crystal_size_rad 0.087(5) _refine_diff_density_max 2.420 _refine_diff_density_min -1.803 _refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881' _refine_ls_abs_structure_Flack 0.0 _refine_ls_extinction_coef 0.0110(2) _refine_ls_extinction_method 'SHELXL93 (Sheldrick, 1993)' _refine_ls_goodness_of_fit_all 1.123 _refine_ls_goodness_of_fit_obs 1.128 _refine_ls_matrix_type full _refine_ls_number_parameters 157 _refine_ls_number_reflns 6358 _refine_ls_number_restraints 0 _refine_ls_restrained_S_all 1.123 _refine_ls_restrained_S_obs 1.128 _refine_ls_R_factor_all 0.0306 _refine_ls_R_factor_obs 0.0279 _refine_ls_shift/esd_max -0.010 _refine_ls_shift/esd_mean 0.002 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'w = 1/[\s^2^(Fo^2^) + 1.3813P] where P = (Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_all 0.0591 _refine_ls_wR_factor_obs 0.0579 _reflns_number_observed 6043 _reflns_number_total 6358 _reflns_observed_criterion I>2\s(I) _[local]_cod_data_source_file an0546.cif _[local]_cod_data_source_block SHELXL_cif _[local]_cod_cif_authors_sg_H-M 'P n a 21 ' _[local]_cod_chemical_formula_sum_orig 'As2 Cs1.80 O10 Rb0.16 Ti2' _cod_database_code 2002914 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x+1/2, y+1/2, z+1/2' 'x+1/2, -y+1/2, z' '-x, -y, z+1/2' 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 Rb1 0.01692(10) 0.00888(8) 0.0374(2) 0.00319(7) 0.00635(10) 0.00282(10) Cs1 0.01692(10) 0.00888(8) 0.0374(2) 0.00319(7) 0.00635(10) 0.00282(10) Cs2 0.01097(8) 0.01190(8) 0.02257(12) 0.00298(6) 0.00188(8) 0.00204(9) Ti1 0.00646(13) 0.0086(2) 0.0056(2) -0.00019(15) -0.00018(12) 0.00121(14) Ti2 0.00664(13) 0.00719(15) 0.00569(14) -0.00028(12) 0.00095(13) -0.00005(14) As1 0.00509(8) 0.00691(9) 0.00627(8) -0.00011(8) -0.00075(7) 0.00016(9) As2 0.00753(9) 0.00602(9) 0.00627(8) -0.00017(9) 0.00024(9) -0.00055(8) O1 0.0121(9) 0.0152(10) 0.0125(9) -0.0025(8) -0.0039(7) 0.0079(8) O2 0.0102(8) 0.0151(9) 0.0126(9) 0.0033(8) -0.0042(7) -0.0059(7) O3 0.0061(7) 0.0109(8) 0.0133(9) -0.0007(6) 0.0016(6) 0.0024(7) O4 0.0057(7) 0.0121(8) 0.0173(10) 0.0013(6) -0.0005(6) -0.0030(7) O5 0.0088(8) 0.0127(9) 0.0106(8) -0.0015(7) -0.0017(6) 0.0036(7) O6 0.0094(8) 0.0111(8) 0.0100(8) 0.0007(7) 0.0031(6) 0.0022(7) O7 0.0138(9) 0.0089(8) 0.0130(9) -0.0017(7) 0.0036(7) -0.0008(7) O8 0.0153(9) 0.0080(8) 0.0170(10) 0.0023(7) -0.0050(8) 0.0007(7) O9 0.0114(9) 0.0140(9) 0.0097(8) 0.0047(8) -0.0036(7) -0.0048(7) O10 0.0137(9) 0.0123(9) 0.0101(8) -0.0034(7) 0.0040(7) -0.0040(7) loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv _atom_site_thermal_displace_type _atom_site_calc_flag _atom_site_refinement_flags _atom_site_occupancy _atom_site_type_symbol Rb1 0.38616(2) 0.78457(3) 0.3592(2) 0.02107(6) Uani d P 0.15 Rb Cs1 0.38616(2) 0.78457(3) 0.3592(2) 0.02107(6) Uani d P 0.78 Cs Cs2 0.10987(2) 0.69479(4) 0.1015(2) 0.01515(5) Uani d P 0.86 Cs Ti1 0.37255(3) 0.50199(8) 0.0094(3) 0.00692(7) Uani d . 1 Ti Ti2 0.25167(4) 0.26521(7) 0.2612(3) 0.00651(6) Uani d . 1 Ti As1 0.50134(2) 0.32636(4) 0.2662(3) 0.00609(4) Uani d . 1 As As2 0.17813(2) 0.50065(4) 0.5207(3) 0.00661(4) Uani d . 1 As O1 0.4860(2) 0.4758(4) 0.1449(3) 0.0132(4) Uani d . 1 O O2 0.5151(2) 0.4621(4) 0.3968(3) 0.0126(4) Uani d . 1 O O3 0.3979(2) 0.1903(3) 0.2920(3) 0.0101(3) Uani d . 1 O O4 0.6028(2) 0.1842(4) 0.2460(3) 0.0117(4) Uani d . 1 O O5 0.2158(2) 0.9418(4) 0.6504(3) 0.0107(3) Uani d . 1 O O6 0.2179(2) 0.0557(3) 0.4012(3) 0.0102(3) Uani d . 1 O O7 0.1118(2) 0.2998(3) 0.5576(3) 0.0119(3) Uani d . 1 O O8 0.1105(2) 0.6991(3) 0.4841(3) 0.0134(4) Uani d . 1 O O9 0.2534(2) 0.5464(4) 0.6442(3) 0.0117(4) Uani d . 1 O O10 0.2565(2) 0.4497(4) 0.4021(3) 0.0120(4) Uani d . 1 O Cs3 0.3888 0.8061 0.4027 0.015 Uiso d P 0.0585(12) Cs Cs4 0.1115 0.7132 0.1304 0.015 Uiso d P 0.104(2) Cs loop_ _atom_type_symbol _atom_type_scat_dispersion_real _atom_type_scat_dispersion_imag _atom_type_scat_source 'Rb ' -0.9393 2.9676 International_Tables_Vol_IV_Table_2.2B 'Cs ' -0.3680 2.1192 International_Tables_Vol_IV_Table_2.2B 'Ti ' 0.2776 0.4457 International_Tables_Vol_IV_Table_2.2B 'As ' 0.0499 2.0058 International_Tables_Vol_IV_Table_2.2B 'O ' 0.0106 0.0060 International_Tables_Vol_IV_Table_2.2B 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 _geom_angle_publ_flag O2 Cs1 O3 . 1_565 138.90(7) no O2 Cs1 O10 . . 74.55(8) no O3 Cs1 O10 1_565 . 146.24(7) no O2 Cs1 O6 . 1_565 159.00(7) no O3 Cs1 O6 1_565 1_565 58.34(6) no O10 Cs1 O6 . 1_565 90.55(7) no O2 Cs1 Cs2 . 2 117.75(5) no O3 Cs1 Cs2 1_565 2 57.30(5) no O10 Cs1 Cs2 . 2 118.54(5) no O6 Cs1 Cs2 1_565 2 56.49(5) no O2 Cs1 Cs4 . 3_565 67.40(6) no O3 Cs1 Cs4 1_565 3_565 78.25(5) no O10 Cs1 Cs4 . 3_565 124.61(5) no O6 Cs1 Cs4 1_565 3_565 133.50(5) no Cs2 Cs1 Cs4 2 3_565 114.37(2) no O1 Cs2 O5 3_465 2_544 154.05(7) no O1 Cs2 O4 3_465 3_455 125.32(7) no O5 Cs2 O4 2_544 3_455 55.47(6) no O1 Cs2 O7 3_465 4_564 55.65(7) no O5 Cs2 O7 2_544 4_564 144.81(7) no O4 Cs2 O7 3_455 4_564 93.39(6) no O1 Cs2 Cs3 3_465 2_544 136.40(5) no O5 Cs2 Cs3 2_544 2_544 69.55(6) no O4 Cs2 Cs3 3_455 2_544 69.54(6) no O7 Cs2 Cs3 4_564 2_544 85.26(5) no O1 Cs2 Cs1 3_465 2_544 134.53(5) no O5 Cs2 Cs1 2_544 2_544 71.36(5) no O4 Cs2 Cs1 3_455 2_544 73.63(5) no O7 Cs2 Cs1 4_564 2_544 85.25(5) no Cs3 Cs2 Cs1 2_544 2_544 4.11(3) no O6 Ti1 O2 2_554 4_664 96.12(11) no O6 Ti1 O5 2_554 2_544 97.64(10) no O2 Ti1 O5 4_664 2_544 166.10(10) no O6 Ti1 O8 2_554 2_544 101.57(11) no O2 Ti1 O8 4_664 2_544 87.74(11) no O5 Ti1 O8 2_544 2_544 87.60(10) no O6 Ti1 O7 2_554 2_554 91.68(11) no O2 Ti1 O7 4_664 2_554 87.24(11) no O5 Ti1 O7 2_544 2_554 94.29(10) no O8 Ti1 O7 2_544 2_554 166.26(9) no O6 Ti1 O1 2_554 . 172.52(11) no O2 Ti1 O1 4_664 . 82.77(9) no O5 Ti1 O1 2_544 . 83.83(10) no O8 Ti1 O1 2_544 . 85.79(11) no O7 Ti1 O1 2_554 . 80.89(10) no O6 Ti1 Ti2 2_554 . 106.52(8) no O2 Ti1 Ti2 4_664 . 152.24(8) no O5 Ti1 Ti2 2_544 . 16.53(7) no O8 Ti1 Ti2 2_544 . 72.38(7) no O7 Ti1 Ti2 2_554 . 107.51(7) no O1 Ti1 Ti2 . . 76.76(7) no O6 Ti1 Ti2 2_554 2_554 21.93(8) no O2 Ti1 Ti2 4_664 2_554 80.92(7) no O5 Ti1 Ti2 2_544 2_554 112.84(7) no O8 Ti1 Ti2 2_544 2_554 116.47(8) no O7 Ti1 Ti2 2_554 2_554 75.28(7) no O1 Ti1 Ti2 . 2_554 151.62(7) no Ti2 Ti1 Ti2 . 2_554 125.01(2) no O5 Ti2 O9 2_544 2_544 95.88(11) no O5 Ti2 O10 2_544 . 93.95(11) no O9 Ti2 O10 2_544 . 169.87(11) no O5 Ti2 O4 2_544 3_455 94.28(10) no O9 Ti2 O4 2_544 3_455 92.53(11) no O10 Ti2 O4 . 3_455 89.17(11) no O5 Ti2 O3 2_544 . 92.34(10) no O9 Ti2 O3 2_544 . 86.88(10) no O10 Ti2 O3 . . 90.28(11) no O4 Ti2 O3 3_455 . 173.38(10) no O5 Ti2 O6 2_544 . 177.23(11) no O9 Ti2 O6 2_544 . 85.91(9) no O10 Ti2 O6 . . 84.18(10) no O4 Ti2 O6 3_455 . 87.74(9) no O3 Ti2 O6 . . 85.64(9) no O5 Ti2 Ti1 2_544 . 18.66(8) no O9 Ti2 Ti1 2_544 . 82.98(7) no O10 Ti2 Ti1 . . 105.97(7) no O4 Ti2 Ti1 3_455 . 108.24(7) no O3 Ti2 Ti1 . . 78.24(7) no O6 Ti2 Ti1 . . 160.85(7) no O5 Ti2 Ti1 2_544 2_545 163.21(8) no O9 Ti2 Ti1 2_544 2_545 94.24(7) no O10 Ti2 Ti1 . 2_545 76.80(7) no O4 Ti2 Ti1 3_455 2_545 71.88(7) no O3 Ti2 Ti1 . 2_545 101.58(7) no O6 Ti2 Ti1 . 2_545 17.62(6) no Ti1 Ti2 Ti1 . 2_545 177.21(2) no O1 As1 O2 . . 108.79(12) no O1 As1 O4 . . 110.67(13) no O2 As1 O4 . . 109.46(12) no O1 As1 O3 . . 111.17(12) no O2 As1 O3 . . 104.88(13) no O4 As1 O3 . . 111.67(10) no O8 As2 O7 . . 115.17(11) no O8 As2 O10 . . 109.28(13) no O7 As2 O10 . . 109.87(12) no O8 As2 O9 . . 110.91(12) no O7 As2 O9 . . 106.54(13) no O10 As2 O9 . . 104.51(11) no As1 O1 Ti1 . . 132.58(15) no As1 O1 Cs4 . 3_565 116.56(13) no Ti1 O1 Cs4 . 3_565 110.08(11) no As1 O1 Cs2 . 3_565 122.77(12) no Ti1 O1 Cs2 . 3_565 104.17(9) no Cs4 O1 Cs2 3_565 3_565 6.44(5) no As1 O2 Ti1 . 4_665 131.80(14) no As1 O2 Cs1 . . 104.01(11) no Ti1 O2 Cs1 4_665 . 117.72(11) no As1 O2 Cs3 . . 113.48(12) no Ti1 O2 Cs3 4_665 . 109.83(11) no Cs1 O2 Cs3 . . 9.69(5) no As1 O3 Ti2 . . 128.46(13) no As1 O3 Cs1 . 1_545 127.97(11) no Ti2 O3 Cs1 . 1_545 103.17(8) no As1 O3 Cs3 . 1_545 126.89(11) no Ti2 O3 Cs3 . 1_545 104.57(8) no Cs1 O3 Cs3 1_545 1_545 9.76(5) no As1 O4 Ti2 . 3 133.32(14) no As1 O4 Cs4 . 3 127.41(11) no Ti2 O4 Cs4 3 3 98.56(9) no As1 O4 Cs2 . 3 125.76(11) no Ti2 O4 Cs2 3 3 98.96(9) no Cs4 O4 Cs2 3 3 6.36(4) no Ti2 O5 Ti1 2 2 144.82(14) no Ti2 O5 Cs2 2 2 108.95(10) no Ti1 O5 Cs2 2 2 102.80(9) no Ti2 O5 Cs4 2 2 106.45(10) no Ti1 O5 Cs4 2 2 106.63(10) no Cs2 O5 Cs4 2 2 6.44(5) no Ti1 O6 Ti2 2_545 . 140.45(13) no Ti1 O6 Cs3 2_545 1_545 115.98(11) no Ti2 O6 Cs3 . 1_545 103.52(9) no Ti1 O6 Cs1 2_545 1_545 120.69(11) no Ti2 O6 Cs1 . 1_545 98.70(8) no Cs3 O6 Cs1 1_545 1_545 9.45(5) no As2 O7 Ti1 . 2_545 132.50(13) no As2 O7 Cs2 . 4_565 123.38(12) no Ti1 O7 Cs2 2_545 4_565 98.55(9) no As2 O8 Ti1 . 2 135.01(14) no As2 O9 Ti2 . 2 128.38(13) no As2 O9 Cs4 . 2_545 100.92(11) no Ti2 O9 Cs4 2 2_545 130.70(11) no As2 O10 Ti2 . . 133.48(14) no As2 O10 Cs1 . . 109.34(10) no Ti2 O10 Cs1 . . 113.75(10) no As2 O10 Cs3 . . 101.61(11) no Ti2 O10 Cs3 . . 122.61(11) no Cs1 O10 Cs3 . . 9.25(5) no O6 Cs3 O3 1_565 1_565 59.28(6) no O6 Cs3 O2 1_565 . 162.38(7) no O3 Cs3 O2 1_565 . 134.77(9) no O6 Cs3 O10 1_565 . 90.40(7) no O3 Cs3 O10 1_565 . 139.41(9) no O2 Cs3 O10 . . 72.05(7) no O6 Cs3 Cs2 1_565 2 62.77(6) no O3 Cs3 Cs2 1_565 2 62.97(5) no O2 Cs3 Cs2 . 2 129.99(8) no O10 Cs3 Cs2 . 2 129.38(8) no O6 Cs3 Cs4 1_565 2 63.53(6) no O3 Cs3 Cs4 1_565 2 65.50(7) no O2 Cs3 Cs4 . 2 128.63(6) no O10 Cs3 Cs4 . 2 127.44(6) no Cs2 Cs3 Cs4 2 2 2.54(3) no O1 Cs4 O9 3_465 2_554 76.96(8) no O1 Cs4 O5 3_465 2_544 165.11(9) no O9 Cs4 O5 2_554 2_544 89.77(7) no O1 Cs4 O4 3_465 3_455 131.50(10) no O9 Cs4 O4 2_554 3_455 135.49(9) no O5 Cs4 O4 2_544 3_455 55.59(6) no O1 Cs4 Cs3 3_465 2_544 128.68(7) no O9 Cs4 Cs3 2_554 2_544 128.40(6) no O5 Cs4 Cs3 2_544 2_544 65.18(6) no O4 Cs4 Cs3 3_455 2_544 65.70(7) no O1 Cs4 Cs1 3_465 3_465 58.50(7) no O9 Cs4 Cs1 2_554 3_465 116.76(7) no O5 Cs4 Cs1 2_544 3_465 124.32(7) no O4 Cs4 Cs1 3_455 3_465 73.32(6) no Cs3 Cs4 Cs1 2_544 3_465 114.56(2) no loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_site_symmetry_2 _geom_bond_distance _geom_bond_publ_flag Cs1 O2 . 2.836(3) no Cs1 O3 1_565 2.870(2) no Cs1 O10 . 2.915(2) no Cs1 O6 1_565 2.962(2) no Cs1 Cs2 2 3.8207(9) no Cs1 Cs4 3_565 3.900(2) no Cs2 O1 3_465 2.841(3) no Cs2 O5 2_544 2.963(2) no Cs2 O4 3_455 3.019(2) no Cs2 O7 4_564 3.022(3) no Cs2 Cs3 2_544 3.405(2) no Cs2 Cs1 2_544 3.8207(9) no Ti1 O6 2_554 1.720(2) no Ti1 O2 4_664 1.949(2) no Ti1 O5 2_544 1.966(2) no Ti1 O8 2_544 2.101(2) no Ti1 O7 2_554 2.111(2) no Ti1 O1 . 2.115(2) no Ti1 Ti2 . 3.5408(10) no Ti1 Ti2 2_554 3.6183(11) no Ti2 O5 2_544 1.748(2) no Ti2 O9 2_544 1.953(2) no Ti2 O10 . 1.967(2) no Ti2 O4 3_455 2.041(2) no Ti2 O3 . 2.060(2) no Ti2 O6 . 2.122(2) no Ti2 Ti1 2_545 3.6183(11) no As1 O1 . 1.665(2) no As1 O2 . 1.688(2) no As1 O4 . 1.691(2) no As1 O3 . 1.698(2) no As2 O8 . 1.680(2) no As2 O7 . 1.685(2) no As2 O10 . 1.687(2) no As2 O9 . 1.695(2) no O1 Cs4 3_565 2.720(3) no O1 Cs2 3_565 2.841(3) no O2 Ti1 4_665 1.949(2) no O2 Cs3 . 2.903(3) no O3 Cs1 1_545 2.870(2) no O3 Cs3 1_545 2.884(3) no O4 Ti2 3 2.041(2) no O4 Cs4 3 2.988(3) no O4 Cs2 3 3.019(2) no O5 Ti2 2 1.748(2) no O5 Ti1 2 1.966(2) no O5 Cs2 2 2.963(2) no O5 Cs4 2 2.983(2) no O6 Ti1 2_545 1.720(2) no O6 Cs3 1_545 2.865(2) no O6 Cs1 1_545 2.962(2) no O7 Ti1 2_545 2.111(2) no O7 Cs2 4_565 3.022(3) no O8 Ti1 2 2.101(2) no O9 Ti2 2 1.953(2) no O9 Cs4 2_545 2.919(2) no O10 Cs3 . 3.018(2) no Cs3 O6 1_565 2.865(2) no Cs3 O3 1_565 2.884(3) no Cs3 Cs2 2 3.405(2) no Cs3 Cs4 2 3.7001(7) no Cs4 O1 3_465 2.720(3) no Cs4 O9 2_554 2.919(2) no Cs4 O5 2_544 2.983(2) no Cs4 O4 3_455 2.988(3) no Cs4 Cs3 2_544 3.7001(7) no Cs4 Cs1 3_465 3.900(2) no