PCU-type copper-rich open-framework chalcogenides: pushing up the length limit of the connection mode and the first mixed-metal [Cu7GeSe13] cluster
Luo, Min; Hu, Dandan; Yang, Huajun; Li, Dongsheng; Wu, Tao; Inorganic Chemistry Frontiers 4 (2017) 387–; doi:10.1039/C6QI00482B

data_4349604
_publ_section_title
;
 PCU-type copper-rich open-framework chalcogenides: pushing up the length
 limit of the connection mode and the first mixed-metal [Cu7GeSe13]
 cluster
;
_journal_issue                   2
_journal_name_full               'Inorganic Chemistry Frontiers'
_journal_page_first              387
_journal_paper_doi               10.1039/C6QI00482B
_journal_volume                  4
_journal_year                    2017
_chemical_formula_moiety         '??Cu8Se13?? ??Ge2Se2??3'
_chemical_formula_sum            'Cu32 Ge24 Se76'
_chemical_formula_weight         9776.40
_space_group_IT_number           204
_space_group_name_Hall           '-I 2 2 3'
_space_group_name_H-M_alt        'I m -3'
_symmetry_cell_setting           cubic
_symmetry_space_group_name_Hall  '-I 2 2 3'
_symmetry_space_group_name_H-M   'I m -3'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2016-03-28 deposited with the CCDC.
2016-12-16 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   23.5208(17)
_cell_length_b                   23.5208(17)
_cell_length_c                   23.5208(17)
_cell_measurement_reflns_used    7110
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      20.9101
_cell_measurement_theta_min      2.4492
_cell_volume                     13012.4(16)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1363
_diffrn_reflns_av_sigmaI/netI    0.0505
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            49106
_diffrn_reflns_theta_full        22.47
_diffrn_reflns_theta_max         22.47
_diffrn_reflns_theta_min         2.12
_exptl_absorpt_coefficient_mu    15.912
_exptl_absorpt_correction_T_max  0.222
_exptl_absorpt_correction_T_min  0.204
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    2.495
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cubic
_exptl_crystal_F_000             8560
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.709
_refine_diff_density_min         -0.768
_refine_diff_density_rms         0.160
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.086
_refine_ls_matrix_type           full
_refine_ls_number_parameters     54
_refine_ls_number_reflns         1539
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.1220
_refine_ls_R_factor_gt           0.0771
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0716P)^2^+538.2859P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1782
_refine_ls_wR_factor_ref         0.1987
_reflns_number_gt                1074
_reflns_number_total             1539
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c6qi00482b2.cif
_cod_data_source_block           ay7_sq_d
_cod_original_sg_symbol_H-M      Im-3
_cod_database_code               4349604