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_1568136
_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(Cu8 Na8.79 O2 Se8)'
_chemical_formula_sum            'Cu4 Na4.39 O Se4'
_chemical_formula_weight         687.04
_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     dual
_audit_contact_author_name
;
;
_audit_creation_date             2021-08-31
_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                   11.2320(16)
_cell_length_b                   11.2320(16)
_cell_length_c                   4.0301(8)
_cell_measurement_reflns_used    1193
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      58.266
_cell_measurement_theta_min      7.256
_cell_volume                     508.43(14)
_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    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.967
_diffrn_measured_fraction_theta_max 0.967
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0496
_diffrn_reflns_av_unetI/netI     0.0488
_diffrn_reflns_Laue_measured_fraction_full 0.967
_diffrn_reflns_Laue_measured_fraction_max 0.967
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       2
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            380
_diffrn_reflns_point_group_measured_fraction_full 0.967
_diffrn_reflns_point_group_measured_fraction_max 0.967
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.133
_diffrn_reflns_theta_min         3.628
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    22.698
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    4.488
_exptl_crystal_description       needle
_exptl_crystal_F_000             617
_refine_diff_density_max         1.205
_refine_diff_density_min         -1.742
_refine_diff_density_rms         0.314
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.884
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     24
_refine_ls_number_reflns         380
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_refine_ls_restrained_S_all      0.884
_refine_ls_R_factor_all          0.0510
_refine_ls_R_factor_gt           0.0384
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0587P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0856
_refine_ls_wR_factor_ref         0.0879
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                277
_reflns_number_total             380
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            I_Cu4Na4.4OSe4.cif
_cod_data_source_block           I
_cod_original_cell_volume        508.43(18)
_cod_database_code               1568136
_shelx_shelxl_version_number     2018/3
_olex2_refinement_description
;
;
_olex2_submission_special_instructions 'No special instructions were received'