The novel sandwich-type heteropolyoxotungstates [M2Bi2(beta-B-MW9O34)2]14- (M = Co(II), Zn(II)): beta-type dimeric heteropolyanions with a transition metal as the central heteroatom and Bi(III) and M as linking atoms.
Liu, Ying; Liu, Bin; Xue, Ganglin; Hu, Huaiming; Fu, Feng; Wang, Jiwu; Dalton transactions (Cambridge, England : 2003)  (2007) 3634–3639; doi:10.1039/b706018a

data_7005834
_publ_section_title
;
 The novel sandwich-type heteropolyoxotungstates
 [M2Bi2(beta-B-MW9O34)2]14- (M = Co(II), Zn(II)): beta-type dimeric
 heteropolyanions with a transition metal as the central heteroatom and
 Bi(III) and M as linking atoms.
;
_journal_issue                   33
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3634
_journal_page_last               3639
_journal_paper_doi               10.1039/b706018a
_journal_year                    2007
_chemical_formula_sum            'Bi2 Co4 H96 Na14 O116 W18'
_chemical_formula_weight         6237.61
_chemical_name_systematic
;
?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   none
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                65.28(3)
_cell_angle_beta                 89.35(3)
_cell_angle_gamma                72.08(3)
_cell_formula_units_Z            1
_cell_length_a                   13.509(3)
_cell_length_b                   14.427(3)
_cell_length_c                   15.300(3)
_cell_measurement_temperature    293(2)
_cell_volume                     2553.4(13)
_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_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_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  0.0521
_diffrn_reflns_av_sigmaI/netI    0.0809
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9338
_diffrn_reflns_theta_full        24.98
_diffrn_reflns_theta_max         24.98
_diffrn_reflns_theta_min         1.48
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    24.434
_exptl_absorpt_correction_T_max  0.2475
_exptl_absorpt_correction_T_min  0.0656
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    4.057
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2784
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.06
_refine_diff_density_max         6.639
_refine_diff_density_min         -3.265
_refine_diff_density_rms         0.611
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     400
_refine_ls_number_reflns         8917
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.1131
_refine_ls_R_factor_gt           0.0656
_refine_ls_shift/su_max          0.023
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1036P)^2^+148.7313P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1659
_refine_ls_wR_factor_ref         0.1992
_reflns_number_gt                5917
_reflns_number_total             8917
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b706018a.txt
_cod_data_source_block           xg1
_cod_original_cell_volume        2553.4(9)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7005834