Discovery of chalcogenides structures and compositions using mixed fluxes
Zhou, Xiuquan; Kolluru, Venkata Surya Chaitanya; Xu, Wenqian; Wang, Luqing; Chang, Tieyan; Chen, Yu-Sheng; Yu, Lei; Wen, Jianguo; Chan, Maria K. Y.; Chung, Duck Young; Kanatzidis, Mercouri G.; Nature 612 (2022) 72–77; doi:10.1038/s41586-022-05307-7

data_1568143
_publ_section_title
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 Discovery of chalcogenides structures and compositions using mixed fluxes
;
_journal_issue                   7938
_journal_name_full               Nature
_journal_page_first              72
_journal_page_last               77
_journal_paper_doi               10.1038/s41586-022-05307-7
_journal_volume                  612
_journal_year                    2022
_chemical_formula_moiety         '0.5(Cu7.02 K8.69 O1.71 Se8)'
_chemical_formula_sum            'Cu3.52 K4.33 O0.88 Se4'
_chemical_formula_weight         722.57
_space_group_crystal_system      tetragonal
_space_group_IT_number           87
_space_group_name_Hall           '-I 4'
_space_group_name_H-M_alt        'I 4/m'
_atom_sites_solution_hydrogens   .
_atom_sites_solution_primary     iterative
_audit_contact_author_name
;
;
_audit_creation_date             2022-03-23
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   12.335(2)
_cell_length_b                   12.335(2)
_cell_length_c                   4.4330(8)
_cell_measurement_reflns_used    738
_cell_measurement_temperature    100
_cell_measurement_theta_max      37.012
_cell_measurement_theta_min      2.716
_cell_volume                     674.5(2)
_computing_cell_refinement       'SAINT V8.38A (?, 2016)'
_computing_data_reduction        'SAINT V8.38A (?, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'olex2.solve (Bourhis et al., 2015)'
_diffrn_ambient_temperature      100
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           Synchrotron
_diffrn_radiation_wavelength     0.41328
_diffrn_reflns_av_R_equivalents  0.1560
_diffrn_reflns_av_unetI/netI     0.0670
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            15266
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        14.357
_diffrn_reflns_theta_max         18.506
_diffrn_reflns_theta_min         1.358
_exptl_absorpt_coefficient_mu    18.345
_exptl_absorpt_correction_T_max  0.7422
_exptl_absorpt_correction_T_min  0.6249
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1661 before and 0.0983 after correction.
The Ratio of minimum to maximum transmission is 0.8420.
The \l/2 correction factor is Not present.
;
_exptl_crystal_density_diffrn    3.726
_exptl_crystal_description       needle
_exptl_crystal_F_000             686
_refine_diff_density_max         1.457
_refine_diff_density_min         -0.903
_refine_diff_density_rms         0.327
_refine_ls_extinction_coef       0.018(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.143
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     27
_refine_ls_number_reflns         713
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.143
_refine_ls_R_factor_all          0.0489
_refine_ls_R_factor_gt           0.0385
_refine_ls_shift/su_max          0.021
_refine_ls_shift/su_mean         0.006
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0205P)^2^+3.2318P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0910
_refine_ls_wR_factor_ref         0.0970
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                599
_reflns_number_total             713
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            VIII_K4.3Cu3.5Se4O0.86.cif
_cod_data_source_block           VIII
_cod_original_cell_volume        674.5(3)
_cod_database_code               1568143
_shelx_shelxl_version_number     2018/3
_olex2_refinement_description
;
;
_olex2_submission_special_instructions 'No special instructions were received'