Assembly and spontaneous resolution of the chiral inorganic polyoxometalates-based frameworks via helical chains association.
Tang, Qun; Liu, Shuxia; Liu, Yiwei; Li, Shujun; Ma, Fengji; Li, Jianxin; Wang, Shengtian; Liu, Chengzhan; Dalton transactions (Cambridge, England : 2003) 42 (2013) 8512–8518; doi:10.1039/c3dt50672j

data_7023088
_publ_section_title
;
 Assembly and spontaneous resolution of the chiral inorganic
 polyoxometalates-based frameworks via helical chains association.
;
_journal_issue                   23
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              8512
_journal_page_last               8518
_journal_paper_doi               10.1039/c3dt50672j
_journal_volume                  42
_journal_year                    2013
_chemical_formula_moiety         'Si O40 W12, 6(O), 2(K)'
_chemical_formula_sum            'K2 O46 Si W12'
_chemical_formula_weight         3048.37
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           181
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'P 64 2 (0 0 2)'
_symmetry_space_group_name_H-M   'P 64 2 2'
_atom_sites_solution_hydrogens   none
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            3
_cell_length_a                   19.1718(16)
_cell_length_b                   19.1718(16)
_cell_length_c                   12.584(2)
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.280
_cell_measurement_theta_min      2.67
_cell_volume                     4005.7(8)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 10.0
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_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  0.1330
_diffrn_reflns_av_sigmaI/netI    0.1017
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            17730
_diffrn_reflns_theta_full        29.28
_diffrn_reflns_theta_max         29.28
_diffrn_reflns_theta_min         2.67
_exptl_absorpt_coefficient_mu    25.996
_exptl_absorpt_correction_T_max  0.007
_exptl_absorpt_correction_T_min  0.001
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    3.791
_exptl_crystal_density_meas      3.791
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod-like
_exptl_crystal_F_000             3924.0
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.19
_refine_diff_density_max         1.817
_refine_diff_density_min         -2.043
_refine_diff_density_rms         0.354
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.04(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     140
_refine_ls_number_reflns         3320
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0791
_refine_ls_R_factor_gt           0.0520
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0382P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0983
_refine_ls_wR_factor_ref         0.1041
_reflns_number_gt                2150
_reflns_number_total             2381
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt50672j.cif
_cod_data_source_block           425634
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Hexagonal' changed to 'hexagonal'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

2018-11-26
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_formula_sum            'K6 O138 Si3 W36'
_cod_original_formula_weight         9145.11
_cod_original_formula_moiety         '3(Si O40 W12), 2(O3), 12(O), 6(K)'
_cod_original_formula_units_Z            1
_cod_original_cell_volume        4005.7(11)
_cod_database_code               7023088