Ammonium iron(III) molybdate
Wu, Xiaoyuan; Zhang, Hanhui; Huang, Changcang; Huang, Xihe; Sun, Qiaozhen; Lin, Zhihua; Acta Crystallographica Section E 59 (2003) i134–i136; doi:10.1107/S1600536803019597

data_2202302
_publ_section_title
;
 Ammonium iron(III) molybdate
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              i134
_journal_page_last               i136
_journal_paper_doi               10.1107/S1600536803019597
_journal_volume                  59
_journal_year                    2003
_chemical_formula_iupac          '(N H4) [Fe (Mo O4 )2 ]'
_chemical_formula_structural     'N H4 Fe (Mo O4)2'
_chemical_formula_sum            'Fe H4 Mo2 N O8'
_chemical_formula_weight         393.77
_chemical_name_systematic
;
 ammonium iron molybdate
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_hydrogens   difmap
_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                   14.782(3)
_cell_length_b                   5.6774(11)
_cell_length_c                   8.7653(18)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      18
_cell_measurement_theta_min      12
_cell_volume                     735.6(3)
_computing_cell_refinement       'TEXRAY software'
_computing_data_collection
'TEXRAY software (Molecular Structure Corporation, 1999)'
_computing_data_reduction
'TEXSAN (Molecular Structure Corporation, 1999)'
_computing_molecular_graphics    'ORTEX (McArdle, 1995)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Rigaku Weissenberg IP'
_diffrn_measurement_method       'scintillation counter'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_sigmaI/netI    0.0447
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            932
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         2.70
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    5.314
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Brown
_exptl_crystal_density_diffrn    3.556
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             740
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.14
_refine_diff_density_max         1.347
_refine_diff_density_min         -1.200
_refine_ls_extinction_coef       0.0084(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97  (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     71
_refine_ls_number_reflns         932
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.0236
_refine_ls_R_factor_gt           0.0209
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0268P)^2^+0.1878P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0537
_refine_ls_wR_factor_ref         0.0553
_reflns_number_gt                870
_reflns_number_total             932
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            br6116.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.

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 'None' changed to
'none' 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_database_code               2202302
_cod_database_fobs_code          2202302