Precise Molecular Design of High-T<sub>c</sub> 3D Organic-Inorganic Perovskite Ferroelectric: [MeHdabco]RbI<sub>3</sub> (MeHdabco = N-Methyl-1,4-diazoniabicyclo[2.2.2]octane).
Zhang, Wan-Ying; Tang, Yuan-Yuan; Li, Peng-Fei; Shi, Ping-Ping; Liao, Wei-Qiang; Fu, Da-Wei; Ye, Heng-Yun; Zhang, Yi; Xiong, Ren-Gen; Journal of the American Chemical Society 139 (2017) 10897–10902; doi:10.1021/jacs.7b06013

data_4131507
_publ_section_title
;
 Precise Molecular Design of High-T<sub>c</sub> 3D Organic-Inorganic
 Perovskite Ferroelectric: [MeHdabco]RbI<sub>3</sub> (MeHdabco =
 N-Methyl-1,4-diazoniabicyclo[2.2.2]octane).
;
_journal_issue                   31
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              10897
_journal_page_last               10902
_journal_paper_doi               10.1021/jacs.7b06013
_journal_volume                  139
_journal_year                    2017
_chemical_formula_sum            'C6 H14 Br3 N2 Rb'
_chemical_formula_weight         439.39
_space_group_crystal_system      trigonal
_space_group_IT_number           154
_space_group_name_Hall           'P 32 2"'
_space_group_name_H-M_alt        'P 32 2 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            6
_cell_length_a                   9.6444(14)
_cell_length_b                   9.6444(14)
_cell_length_c                   23.254(5)
_cell_measurement_reflns_used    10381
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.60
_cell_measurement_theta_min      3.04
_cell_volume                     1873.2(6)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Rigaku mini'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0960
_diffrn_reflns_av_unetI/netI     0.0809
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            12709
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.481
_diffrn_reflns_theta_min         3.003
_exptl_absorpt_coefficient_mu    13.522
_exptl_absorpt_correction_T_max  0.8311
_exptl_absorpt_correction_T_min  0.6031
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.337
_exptl_crystal_description       block
_exptl_crystal_F_000             1236
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.758
_refine_diff_density_min         -1.187
_refine_diff_density_rms         0.228
_refine_ls_abs_structure_details
;
 Flack x determined using 586 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.04(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.110
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     110
_refine_ls_number_reflns         2875
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.110
_refine_ls_R_factor_all          0.1040
_refine_ls_R_factor_gt           0.0652
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0382P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1127
_refine_ls_wR_factor_ref         0.1241
_reflns_Friedel_coverage         0.708
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                2034
_reflns_number_total             2875
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b06013_si_004.cif
_cod_data_source_block           a
_cod_original_cell_volume        1873.2(7)
_cod_database_code               4131507
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              54755
_shelx_hkl_checksum              93510