A diprotonated hexatungstoplatinate(IV), Na~6~[H~2~PtW~6~O~24~]·22H~2~O
Lee, Uk; Joo, Hea-Chung; Park, Ki-Min; Acta Crystallographica Section E 60 (2004) i55–i57; doi:10.1107/S1600536804004970

data_2203371
_publ_section_title
;
 A diprotonated hexatungstoplatinate(IV),
 Na~6~[H~2~PtW~6~O~24~]&#x00B7;22H~2~O
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              i55
_journal_page_last               i57
_journal_paper_doi               10.1107/S1600536804004970
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          'Na6 [H2 Pt W6 O24], 22H2 O'
_chemical_formula_moiety         'H2 O24 Pt W6 6-, 22H2 O, 6Na 1+'
_chemical_formula_structural     'Na6 [H2 Pt W6 O24], 22H2 O'
_chemical_formula_sum            'H46 Na6 O46 Pt W6'
_chemical_formula_weight         2218.50
_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_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                113.130(10)
_cell_angle_beta                 107.170(10)
_cell_angle_gamma                99.480(10)
_cell_formula_units_Z            1
_cell_length_a                   10.0280(10)
_cell_length_b                   10.5910(10)
_cell_length_c                   12.109(3)
_cell_measurement_reflns_used    27
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      10.5
_cell_measurement_theta_min      9.6
_cell_volume                     1070.8(3)
_computing_cell_refinement       'STADI4 (Stoe & Cie, 1996)'
_computing_data_collection       'STADI4 (Stoe & Cie, 1996)'
_computing_data_reduction        'X-RED (Stoe & Cie, 1996)'
_computing_molecular_graphics
'ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 1998)'
_computing_publication_material  'SHELXL97-2 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL97-2 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Stoe Stadi-4'
_diffrn_measurement_method       '\w/2-\q scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0234
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            4896
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         1.99
_diffrn_standards_decay_%        3.7
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    19.483
_exptl_absorpt_correction_T_max  0.1556
_exptl_absorpt_correction_T_min  0.0505
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   '(X-SHAPE; Stoe & Cie, 1996)'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    3.440
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'hexagonal prism'
_exptl_crystal_F_000             1002
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.10
_refine_diff_density_max         2.618
_refine_diff_density_min         -2.184
_refine_ls_extinction_coef       0.0073(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc2^\l3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.113
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     275
_refine_ls_number_reflns         4896
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.113
_refine_ls_R_factor_all          0.0444
_refine_ls_R_factor_gt           0.0354
_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/[\s2^(Fo2^)+(0.0492P)2^+10.2521P] where P=(Fo2^+2Fc2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0886
_refine_ls_wR_factor_ref         0.0964
_reflns_number_gt                4223
_reflns_number_total             4896
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            br6139.cif
_cod_data_source_block           I
_cod_database_code               2203371
_cod_database_fobs_code          2203371