Bi13S18I2: (Re)discovery of a Subvalent Bismuth Compound Featuring [Bi2]4+ Dimers Grown in Sulfur/Iodine Flux Mixtures
Groom, Ryan; Jacobs, Allison; Cepeda, Marisa; Drummey, Rachel; Latturner, Susan E.; Chemistry of Materials  (2017) –; doi:10.1021/acs.chemmater.7b00702

data_4002831
_publ_section_title
;
 Bi13S18I2: (Re)discovery of a Subvalent Bismuth Compound Featuring
 [Bi2]4+ Dimers Grown in Sulfur/Iodine Flux Mixtures
;
_journal_name_full               'Chemistry of Materials'
_journal_paper_doi               10.1021/acs.chemmater.7b00702
_journal_year                    2017
_chemical_formula_sum            'Bi13 I2 S18'
_chemical_formula_weight         3547.62
_chemical_name_systematic
;
 ?
;
_space_group_crystal_system      trigonal
_space_group_IT_number           143
_space_group_name_Hall           'P 3'
_space_group_name_H-M_alt        'P 3'
_symmetry_space_group_name_Hall  'P 3'
_symmetry_space_group_name_H-M   'P 3'
_audit_creation_method           SHELXL-2014
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            1
_cell_length_a                   15.612(2)
_cell_length_b                   15.612(2)
_cell_length_c                   4.0168(6)
_cell_measurement_reflns_used    2801
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      28.3
_cell_measurement_theta_min      2.6
_cell_volume                     847.9(2)
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD area-detector'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0385
_diffrn_reflns_av_unetI/netI     0.0369
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       5
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            9736
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.253
_diffrn_reflns_theta_min         2.609
_exptl_absorpt_coefficient_mu    70.114
_exptl_absorpt_correction_T_max  0.246
_exptl_absorpt_correction_T_min  0.203
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2008)'
_exptl_crystal_colour            silver
_exptl_crystal_density_diffrn    6.948
_exptl_crystal_description       needle
_exptl_crystal_F_000             1473
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.02
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.891
_refine_diff_density_min         -1.400
_refine_diff_density_rms         0.265
_refine_ls_abs_structure_details
;
 Flack x determined using 1251 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.42(3)
_refine_ls_extinction_coef       0.00151(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     110
_refine_ls_number_reflns         2801
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.0217
_refine_ls_R_factor_gt           0.0196
_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^)+1.1588P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0427
_refine_ls_wR_factor_ref         0.0434
_reflns_Friedel_coverage         0.988
_reflns_Friedel_fraction_full    0.998
_reflns_Friedel_fraction_max     0.987
_reflns_number_gt                2640
_reflns_number_total             2801
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            cm7b00702_si_002.cif
_cod_data_source_block           Bi13S18I2_P3
_cod_original_cell_volume        847.8(3)
_cod_database_code               4002831
_shelxl_version_number           2014-3
_shelx_res_checksum              78424
_shelx_hkl_checksum              7398