Neutron and high-pressure X-ray diffraction study of hydrogen-bonded ferroelectric rubidium hydrogen sulfate
Binns, Jack; McIntyre, Garry J.; Parsons, Simon; Acta Crystallographica Section B 72 (2016) 855–863; doi:10.1107/S2052520616013494

data_2108021
_publ_section_title
;
 Neutron and high-pressure X-ray diffraction study of hydrogen-bonded
 ferroelectric rubidium hydrogen sulfate
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              855
_journal_page_last               863
_journal_paper_doi               10.1107/S2052520616013494
_journal_volume                  72
_journal_year                    2016
_chemical_formula_moiety         'H1 O4 S1, Rb1'
_chemical_formula_sum            'H O4 Rb S'
_chemical_formula_weight         182.54
_chemical_name_systematic        'rubidium hydrogensulfate'
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_audit_creation_method           CRYSTALS_ver_14.40
_cell_angle_alpha                90
_cell_angle_beta                 118.94(3)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   14.334(5)
_cell_length_b                   4.6197(17)
_cell_length_c                   14.361(9)
_cell_measurement_reflns_used    2455
_cell_measurement_temperature    293
_cell_measurement_theta_max      25
_cell_measurement_theta_min      3
_cell_volume                     832.2(7)
_computing_cell_refinement       'Apex2 (Bruker AXS, 2006)'
_computing_data_collection       'Apex2 (Bruker AXS, 2006)'
_computing_data_reduction        'Apex2 (Bruker AXS, 2006)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      293
_diffrn_measured_fraction_theta_full 0.592
_diffrn_measured_fraction_theta_max 0.529
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Bruker Kappa Apex2'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.048
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            4115
_diffrn_reflns_theta_full        18.532
_diffrn_reflns_theta_max         24.709
_diffrn_reflns_theta_min         3.248
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    12.268
_exptl_absorpt_correction_T_max  0.29
_exptl_absorpt_correction_T_min  0.08
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Siemens, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.914
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             688
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.100
_refine_diff_density_max         1.27
_refine_diff_density_min         -0.99
_refine_ls_extinction_coef       9(2)
_refine_ls_extinction_method     'Larson (1970), Equation 22'
_refine_ls_goodness_of_fit_ref   1.0386
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     110
_refine_ls_number_reflns         658
_refine_ls_number_restraints     68
_refine_ls_R_factor_all          0.0996
_refine_ls_R_factor_gt           0.0689
_refine_ls_shift/su_max          0.0000913
_refine_ls_shift/su_mean         0.0000062
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982)
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)]
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax
 Method = Robust Weighting (Prince, 1982)
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^
 A~i~ are:
 7.24 9.98 4.57 0.838
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1809
_refine_ls_wR_factor_gt          0.1390
_refine_ls_wR_factor_ref         0.1390
_reflns_number_gt                658
_reflns_number_total             754
_reflns_threshold_expression     I>2.0\s(I)
_cod_data_source_file            fx5004sup1.cif
_cod_data_source_block           jb0009
_cod_original_sg_symbol_H-M      'P 1 21/n 1 '
_cod_original_formula_sum        'H1 O4 Rb1 S1'
_cod_database_code               2108021
_cod_database_fobs_code 2108021