Disorder in crystals of dioxofluorotungstates, (NH~4~)~2~WO~2~F~4~ and Rb~2~WO~2~F~4~
Udovenko, Anatoly A.; Laptash, Natalia M.; Acta Crystallographica Section B 64 (2008) 645–651; doi:10.1107/S0108768108033053

data_2104223
_publ_section_title
;
 Disorder in crystals of dioxofluorotungstates, (NH~4~)~2~WO~2~F~4~ and
 Rb~2~WO~2~F~4~
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              645
_journal_page_last               651
_journal_paper_doi               10.1107/S0108768108033053
_journal_volume                  64
_journal_year                    2008
_chemical_formula_moiety         '(F4 O2 W),2(H4N)'
_chemical_formula_sum            'F4 N2 O2 W'
_chemical_formula_weight         327.93
_chemical_name_common            'ammonium dioxotetrafluorotungstate'
_chemical_name_systematic        'ammonium dioxotetrafluorotungstate'
_space_group_IT_number           63
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-C 2c 2'
_symmetry_space_group_name_H-M   'C m c m'
_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                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.9410(4)
_cell_length_b                   14.4206(10)
_cell_length_c                   7.1456(5)
_cell_measurement_reflns_used    863
_cell_measurement_temperature    297(2)
_cell_measurement_theta_max      38.96
_cell_measurement_theta_min      2.83
_cell_volume                     612.18(7)
_computing_cell_refinement       'Bruker SAINT v6.02a (Bruker, 2000)'
_computing_data_collection       'Bruker Smart v5.054 (Bruker, 1998)'
_computing_data_reduction        'Bruker SAINT v6.02a (Bruker, 2000)'
_computing_molecular_graphics    'Bruker SHELXTL v5.1 (Bruker, 1998)'
_computing_publication_material  'Bruker SHELXTL v5.1 (Bruker, 1998)'
_computing_structure_refinement  'Bruker SHELXTL v5.1 (Bruker, 1998)'
_computing_structure_solution    'Bruker SHELXTL v5.1 (Bruker, 1998)'
_diffrn_ambient_temperature      297(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker Smart 1000 CCD'
_diffrn_measurement_method       '\w 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  0.0344
_diffrn_reflns_av_sigmaI/netI    0.0199
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            8105
_diffrn_reflns_theta_full        38.96
_diffrn_reflns_theta_max         38.96
_diffrn_reflns_theta_min         2.83
_exptl_absorpt_coefficient_mu    18.773
_exptl_absorpt_correction_T_max  0.0888
_exptl_absorpt_correction_T_min  0.0888
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS v.2.03; Bruker 1999'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    3.558
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       sphere
_exptl_crystal_F_000             557
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.26
_exptl_crystal_size_rad          0.13
_refine_diff_density_max         1.583
_refine_diff_density_min         -1.520
_refine_ls_extinction_coef       0.0201(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.128
_refine_ls_matrix_type           full
_refine_ls_number_parameters     41
_refine_ls_number_reflns         1012
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.128
_refine_ls_R_factor_all          0.0231
_refine_ls_R_factor_gt           0.0200
_refine_ls_shift/su_max          0.045
_refine_ls_shift/su_mean         0.010
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0203P)^2^+0.6776P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0441
_refine_ls_wR_factor_ref         0.0450
_reflns_number_gt                937
_reflns_number_total             1012
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            bp5013.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-scan' changed
to 'multi-scan' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      Cmcm
_cod_database_code               2104223