Homochiral Nickel Nitrite ABX<sub>3</sub> (X = NO<sub>2</sub><sup>-</sup>) Perovskite Ferroelectrics.
Deng, Bin-Bin; Xu, Chu-Chu; Cheng, Ting-Ting; Yang, Yi-Ting; Hu, Yan-Ting; Wang, Pan; He, Wen-Hui; Yang, Meng-Juan; Liao, Wei-Qiang; Journal of the American Chemical Society  (2020) –; doi:10.1021/jacs.0c02580

data_4134613
_publ_section_title
;
 Homochiral Nickel Nitrite ABX<sub>3</sub> (X =
 NO<sub>2</sub><sup>-</sup>) Perovskite Ferroelectrics.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.0c02580
_journal_year                    2020
_chemical_absolute_configuration ad
_chemical_formula_moiety         'N3 Ni O6, C8 H16 N O'
_chemical_formula_sum            'C8 H16 N4 Ni O7'
_chemical_formula_weight         338.94
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 112.658(14)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   9.7669(11)
_cell_length_b                   7.0025(5)
_cell_length_c                   10.1992(12)
_cell_measurement_reflns_used    2070
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      26.5790
_cell_measurement_theta_min      3.6120
_cell_volume                     643.71(13)
_computing_cell_refinement       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_collection       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_reduction        'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_molecular_graphics    'DIAMOND (Brandenburg & Putz, 2005)'
_computing_publication_material  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.817
_diffrn_measurement_device_type  'XtaLAB Synergy R, DW system, HyPix'
_diffrn_measurement_method       'four-circle diffractometer'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0518
_diffrn_reflns_av_unetI/netI     0.0976
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.817
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            5808
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.818
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         31.566
_diffrn_reflns_theta_min         3.627
_diffrn_source                   'Rotating-anode X-ray tube'
_exptl_absorpt_coefficient_mu    1.547
_exptl_absorpt_correction_T_max  0.844
_exptl_absorpt_correction_T_min  0.831
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_exptl_crystal_colour            Brown
_exptl_crystal_density_diffrn    1.749
_exptl_crystal_description       Prism
_exptl_crystal_F_000             352
_exptl_crystal_size_max          0.120
_exptl_crystal_size_mid          0.120
_exptl_crystal_size_min          0.110
_refine_diff_density_max         0.512
_refine_diff_density_min         -0.469
_refine_diff_density_rms         0.094
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.00(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.001
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     182
_refine_ls_number_reflns         4306
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.001
_refine_ls_R_factor_all          0.0795
_refine_ls_R_factor_gt           0.0541
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0200P)^2^+0.3420P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1007
_refine_ls_wR_factor_ref         0.1131
_reflns_Friedel_coverage         0.868
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.820
_reflns_number_gt                4306
_reflns_number_total             4306
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja0c02580_si_005.cif
_cod_data_source_block           P21
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4134613
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.836
_shelx_estimated_absorpt_t_max   0.848
_shelx_res_checksum              24513
_shelx_hkl_checksum              91983