Discovery of an Antiperovskite Ferroelectric in [(CH<sub>3</sub>)<sub>3</sub>NH]<sub>3</sub>(MnBr<sub>3</sub>)(MnBr<sub>4</sub>).
Wei, Zhenhong; Liao, Wei-Qiang; Tang, Yuan-Yuan; Li, Peng-Fei; Shi, Ping-Ping; Cai, Hu; Xiong, Ren-Gen; Journal of the American Chemical Society 140 (2018) 8110–8113; doi:10.1021/jacs.8b05037

data_4132593
_publ_section_title
;
 Discovery of an Antiperovskite Ferroelectric in
 [(CH<sub>3</sub>)<sub>3</sub>NH]<sub>3</sub>(MnBr<sub>3</sub>)(MnBr<sub>4</sub>).
;
_journal_issue                   26
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8110
_journal_page_last               8113
_journal_paper_doi               10.1021/jacs.8b05037
_journal_volume                  140
_journal_year                    2018
_chemical_formula_moiety         '3(C3 H10 N),Br3 Mn, Br4 Mn'
_chemical_formula_sum            'C9 H30 Br7 Mn2 N3'
_chemical_formula_weight         849.61
_space_group_crystal_system      hexagonal
_space_group_IT_number           186
_space_group_name_Hall           'P 6c -2c'
_space_group_name_H-M_alt        'P 63 m c'
_atom_sites_solution_hydrogens   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            2
_cell_length_a                   15.0014(6)
_cell_length_b                   15.0014(6)
_cell_length_c                   6.7669(3)
_cell_measurement_reflns_used    5153
_cell_measurement_temperature    423(2)
_cell_measurement_theta_max      27.4700
_cell_measurement_theta_min      1.7529
_cell_volume                     1318.82(9)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      423(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.901
_diffrn_measurement_device_type  'Rigaku saturn 724'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0650
_diffrn_reflns_av_unetI/netI     0.0541
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.901
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            6483
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.897
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         31.466
_diffrn_reflns_theta_min         2.716
_exptl_absorpt_coefficient_mu    11.559
_exptl_absorpt_correction_T_max  0.079
_exptl_absorpt_correction_T_min  0.055
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            orange-red
_exptl_crystal_density_diffrn    2.140
_exptl_crystal_description       needle
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.901
_refine_diff_density_min         -0.336
_refine_diff_density_rms         0.095
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.00(4)
_refine_ls_extinction_coef       0.0220(12)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     45
_refine_ls_number_reflns         1307
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0825
_refine_ls_R_factor_gt           0.0427
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0228P)^2^+1.2304P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0707
_refine_ls_wR_factor_ref         0.0774
_reflns_Friedel_coverage         0.846
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.892
_reflns_number_gt                852
_reflns_number_total             1307
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja8b05037_si_008.cif
_cod_data_source_block           P63mc
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-scan' was
changed to 'multi-scan' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/ACS/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_cell_volume        1318.81(12)
_cod_database_code               4132593
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              80744
_shelx_hkl_checksum              97329