Resolving old problems with layered polytungstates related to hexagonal tungsten bronze: phase formation, structures, crystal chemistry and some properties.
Solodovnikov, Sergey F.; Meshalkin, Arkadiy B.; Sukhikh, Aleksandr S.; Solodovnikova, Zoya A.; Zolotova, Evgeniya S.; Yudin, Vasiliy N.; Kadyrova, Yuliya M.; Khaikina, Elena G.; Mateyshina, Yuliya G.; Uvarov, Nikolai F.; Pugachev, Aleksey M.; Kovtunets, Evgeniy V.; Dalton transactions (Cambridge, England : 2003) 52 (2023) 2770–2785; doi:10.1039/d2dt03895a

data_7712483
_publ_section_title
;
 Resolving old problems with layered polytungstates related to hexagonal
 tungsten bronze: phase formation, structures, crystal chemistry and some
 properties.
;
_journal_issue                   9
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              2770
_journal_page_last               2785
_journal_paper_doi               10.1039/d2dt03895a
_journal_volume                  52
_journal_year                    2023
_chemical_formula_sum            'O22 Rb2 W7'
_chemical_formula_weight         1809.89
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_primary     dual
_audit_creation_method           SHELXL-2017/1
_audit_update_record
;
2022-10-06 deposited with the CCDC.	2023-01-31 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90.051(6)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   3.8318(5)
_cell_length_b                   7.3295(12)
_cell_length_c                   32.060(4)
_cell_measurement_reflns_used    782
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      30.55
_cell_measurement_theta_min      3.18
_cell_volume                     900.4(2)
_computing_structure_refinement  'SHELXL-2017/1 (Sheldrick, 2017)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector                 PIXEL
_diffrn_detector_area_resol_mean 7.41
_diffrn_detector_type            'Bruker PHOTON III area detector'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker D8 Venture diffractometer'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'Incoatec HELIOS multilayer mirrors'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0524
_diffrn_reflns_av_unetI/netI     0.1126
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -45
_diffrn_reflns_number            7716
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.539
_diffrn_reflns_theta_min         1.270
_diffrn_source                   'Incoatec IuS3.0 microfocus X-ray tube'
_exptl_absorpt_coefficient_mu    50.002
_exptl_absorpt_correction_T_max  0.4330
_exptl_absorpt_correction_T_min  0.1641
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2012/1 (Bruker,2012) was used for absorption correction.
wR2(int) was 0.1640 before and 0.0679 after correction.
The Ratio of minimum to maximum transmission is 0.3790.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    6.676
_exptl_crystal_description       plate
_exptl_crystal_F_000             1536
_exptl_crystal_recrystallization_method 'From the Melt'
_exptl_crystal_size_max          0.171
_exptl_crystal_size_mid          0.062
_exptl_crystal_size_min          0.023
_refine_diff_density_max         6.597
_refine_diff_density_min         -11.961
_refine_diff_density_rms         1.018
_refine_ls_abs_structure_details
;
 Twinning involves inversion, so Flack parameter cannot be determined
;
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.074
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     184
_refine_ls_number_reflns         5245
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.1040
_refine_ls_R_factor_gt           0.0863
_refine_ls_shift/su_max          2.277
_refine_ls_shift/su_mean         0.123
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0935P)^2^+52.5455P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2131
_refine_ls_wR_factor_ref         0.2295
_reflns_Friedel_coverage         0.867
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                4238
_reflns_number_total             5245
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2dt03895a2.cif
_cod_data_source_block           Rb2W7O22
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7712483
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_min   0.043
_shelx_estimated_absorpt_t_max   0.393
_shelx_res_checksum              35031
_shelx_hkl_checksum              78189