Copper‒lead selenite bromides: a new large family of compounds partly having Cu^2+^ substructures derivable from kagome nets
Siidra, Oleg I.; Kozin, Michael S.; Depmeier, Wulf; Kayukov, Roman A.; Kovrugin, Vadim M.; Acta Crystallographica Section B 74 (2018) 712–724; doi:10.1107/S2052520618016542

data_2108342
_publ_section_title
;
 Copper--lead selenite bromides: a new large family of compounds partly
 having Cu^2+^ substructures derivable from kagome nets
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              712
_journal_page_last               724
_journal_paper_doi               10.1107/S2052520618016542
_journal_volume                  74
_journal_year                    2018
_chemical_formula_sum            'Br0.67 Cu0.67 O2 Pb0.33 Se0.67'
_chemical_formula_weight         249.34
_space_group_crystal_system      orthorhombic
_space_group_IT_number           63
_space_group_name_Hall           '-C 2c 2'
_space_group_name_H-M_alt        'C m c m'
_symmetry_space_group_name_Hall  '-C 2c 2'
_symmetry_space_group_name_H-M   'C m c m'
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            12
_cell_length_a                   8.275(8)
_cell_length_b                   9.303(9)
_cell_length_c                   11.891(12)
_cell_measurement_reflns_used    340
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.536
_cell_measurement_theta_min      3.295
_cell_volume                     915.4(16)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.953
_diffrn_measured_fraction_theta_max 0.931
_diffrn_measurement_device_type  'Bruker Apex2 Duo'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0528
_diffrn_reflns_av_unetI/netI     0.0650
_diffrn_reflns_Laue_measured_fraction_full 0.953
_diffrn_reflns_Laue_measured_fraction_max 0.931
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            1577
_diffrn_reflns_point_group_measured_fraction_full 0.953
_diffrn_reflns_point_group_measured_fraction_max 0.931
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.536
_diffrn_reflns_theta_min         3.295
_exptl_absorpt_coefficient_mu    39.621
_exptl_crystal_density_diffrn    5.427
_exptl_crystal_description       prism
_exptl_crystal_F_000             1304
_refine_diff_density_max         1.928
_refine_diff_density_min         -2.118
_refine_diff_density_rms         0.426
_refine_ls_extinction_coef       0.00035(7)
_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   1.018
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     39
_refine_ls_number_reflns         553
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.015
_refine_ls_R_factor_all          0.0546
_refine_ls_R_factor_gt           0.0361
_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^)+(0.0282P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0683
_refine_ls_wR_factor_ref         0.0745
_reflns_Friedel_coverage         0.000
_reflns_number_gt                431
_reflns_number_total             553
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ps5074sup1.cif
_cod_data_source_block           CuPb21
_cod_original_cell_volume        915.4(15)
_cod_database_code               2108342
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              26941
_shelx_hkl_checksum              42530
_cod_database_fobs_code 2108342