Fe~2~(SO~4~)~3~·H~2~SO~4~·28H~2~O, a low-temperature water-rich iron(III) sulfate
Schmidt, Horst; Hennings, Erik; Zürner, Philipp; Voigt, Wolfgang; Acta Crystallographica Section C 69 (2013) 330–333; doi:10.1107/S0108270113005969

data_2018920
_publ_section_title
;
 Fe~2~(SO~4~)~3~&#x00B7;H~2~SO~4~&#x00B7;28H~2~O, a low-temperature
 water-rich iron(III) sulfate
;
_journal_coeditor_code           OV3022
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              330
_journal_page_last               333
_journal_paper_doi               10.1107/S0108270113005969
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'Fe2 (S O4)3 , H2 S O4 , 28H2 O'
_chemical_formula_moiety         'H5 O2 +, Fe H12 O6 +, 2(O4 S -), 6(H2 O)'
_chemical_formula_sum            'Fe H29 O22 S2'
_chemical_formula_weight         501.22
_chemical_name_systematic
;
Diiron(III) trisulfate--sulfuric acid--water (1/1/28)
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.0802(19)
_cell_length_b                   12.7630(19)
_cell_length_c                   12.832(2)
_cell_measurement_reflns_used    11840
_cell_measurement_temperature    200
_cell_measurement_theta_max      29.61
_cell_measurement_theta_min      2.68
_cell_volume                     1978.4(5)
_computing_cell_refinement       'X-AREA (Stoe & Cie, 2001)'
_computing_data_collection       'X-AREA (Stoe & Cie, 2001)'
_computing_data_reduction        'X-RED (Stoe & Cie, 2001)'
_computing_molecular_graphics    'DIAMOND (Brandenburg, 2006)'
_computing_publication_material  'publCIF (Westrip, 2010)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_detector_area_resol_mean 6.67
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       '2-circle goniometer'
_diffrn_measurement_device_type  'Stoe IPDS 2'
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1467
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            17528
_diffrn_reflns_theta_full        24.98
_diffrn_reflns_theta_max         24.98
_diffrn_reflns_theta_min         1.59
_exptl_absorpt_coefficient_mu    1.07
_exptl_absorpt_correction_T_max  0.8858
_exptl_absorpt_correction_T_min  0.7070
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   '(Coppens, 1970)'
_exptl_crystal_colour            violet
_exptl_crystal_density_diffrn    1.683
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1052
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.450
_refine_diff_density_min         -0.682
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     180
_refine_ls_number_reflns         1737
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.011
_refine_ls_R_factor_all          0.0469
_refine_ls_R_factor_gt           0.0348
_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^)+(0.0602P)^2^+0.0200P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0831
_refine_ls_wR_factor_ref         0.0875
_reflns_number_gt                1385
_reflns_number_total             1737
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ov3022.cif
_cod_data_source_block           I_200K
_cod_original_cell_volume        1978.5(5)
_cod_database_code               2018920
_cod_database_fobs_code          2018920