Bandgap Narrowing of Lead-Free Perovskite-Type Hybrids for Visible-Light-Absorbing Ferroelectric Semiconductors.
Ji, Chengmin; Sun, Zhihua; Zeb, Aurang; Liu, Sijie; Zhang, Jing; Hong, Maochun; Luo, Junhua; The journal of physical chemistry letters 8 (2017) 2012–2018; doi:10.1021/acs.jpclett.7b00673

data_8000247
_publ_section_title
;
 Bandgap Narrowing of Lead-Free Perovskite-Type Hybrids for
 Visible-Light-Absorbing Ferroelectric Semiconductors.
;
_journal_issue                   9
_journal_name_full               'The journal of physical chemistry letters'
_journal_page_first              2012
_journal_page_last               2018
_journal_paper_doi               10.1021/acs.jpclett.7b00673
_journal_volume                  8
_journal_year                    2017
_chemical_formula_sum            'C15 H36 Br9 N3 Sb2'
_chemical_formula_weight         1221.16
_space_group_IT_number           161
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'R 3 -2"c'
_symmetry_space_group_name_H-M   'R 3 c :H'
_atom_sites_solution_hydrogens   geom
_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                120.00
_cell_formula_units_Z            6
_cell_length_a                   15.6943(2)
_cell_length_b                   15.6943(2)
_cell_length_c                   23.5279(4)
_cell_measurement_reflns_used    7373
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      73.1930
_cell_measurement_theta_min      3.1740
_cell_volume                     5018.77(12)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'SuperNova (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.1471
_diffrn_reflns_av_sigmaI/netI    0.0776
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            11262
_diffrn_reflns_theta_full        73.32
_diffrn_reflns_theta_max         73.32
_diffrn_reflns_theta_min         4.97
_exptl_absorpt_coefficient_mu    25.475
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.53379
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    2.424
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3384
_exptl_crystal_size_max          0.54
_exptl_crystal_size_mid          0.48
_exptl_crystal_size_min          0.36
_refine_diff_density_max         1.925
_refine_diff_density_min         -6.166
_refine_diff_density_rms         0.547
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.006(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.079
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     89
_refine_ls_number_reflns         2235
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.079
_refine_ls_R_factor_all          0.0807
_refine_ls_R_factor_gt           0.0798
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1478P)^2^+3.7865P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1871
_refine_ls_wR_factor_ref         0.1897
_reflns_number_gt                2174
_reflns_number_total             2235
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jz7b00673_si_006.cif
_cod_data_source_block           NMPB:FEP
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Trigonal' changed to 'trigonal'
according to
/home/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 
;
_cod_original_sg_symbol_H-M      R3c
_cod_database_code               8000247