Structural Analysis of Cs~2~HgBr~4~ in Normal, Incommensurate and Twinned Phases
Pinheiro, C. B.; Jório, A.; Pimenta, M. A.; Speziali, N. L.; Acta Crystallographica Section B 54 (1998) 197–203; doi:10.1107/S0108768197012032

data_2105662
_publ_section_title
;
 Structural Analysis of Cs~2~HgBr~4~ in Normal, Incommensurate and Twinned
 Phases
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              197
_journal_page_last               203
_journal_paper_doi               10.1107/S0108768197012032
_journal_volume                  54
_journal_year                    1998
_chemical_formula_structural     'Cs (HgBr4) Cs'
_chemical_formula_sum            'Br4 Cs2 Hg'
_chemical_formula_weight         786.02
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2xn'
_symmetry_space_group_name_H-M   'P 21/n 1 1'
_atom_type_scat_source
'International Tables for Crystallography Vol-C (1992)'
_cell_angle_alpha                90.000(7)
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.2310(10)
_cell_length_b                   7.8730(10)
_cell_length_c                   13.9060(10)
_cell_measurement_reflns_used    65
_cell_measurement_temperature    213
_cell_measurement_theta_max      15.00
_cell_measurement_theta_min      7.50
_cell_volume                     1120.1(2)
_computing_cell_refinement       'SHELXTL PC (Sheldric, 1990)'
_computing_data_collection       'XSCANS Siemens software'
_computing_data_reduction
'DATRED - JANA'96 (Petricek, V. \&, Dusek, M. 1996)'
_computing_molecular_graphics    'ORTEP III (Burnett & Johnson, 1996)'
_computing_structure_refinement
'REFINE - JANA'96 (Petricek, V. \&, Dusek, M. 1996)'
_computing_structure_solution
'FOURIER - JANA'96 (Petricek, V. \&, Dusek, M. 1996)'
_diffrn_ambient_temperature      213
_diffrn_measurement_device       'Siemens P4 diffractometer'
_diffrn_measurement_method       \q/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'X-ray tube'
_diffrn_radiation_type           'Ag K\a'
_diffrn_radiation_wavelength     0.5608
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            1250
_diffrn_reflns_theta_max         22.5
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 197
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    18.50
_exptl_absorpt_correction_T_max  0.180
_exptl_absorpt_correction_T_min  0.166
_exptl_absorpt_correction_type   Spherical
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    4.660
_exptl_crystal_density_meas      ?
_exptl_crystal_description       Spherical
_exptl_crystal_size_rad          0.065(5)
_refine_diff_density_max         8.7
_refine_diff_density_min         -8.2
_refine_ls_extinction_coef       0.39(6)
_refine_ls_extinction_method     'Larson (1967)'
_refine_ls_goodness_of_fit_obs   1.42
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     67
_refine_ls_number_reflns         1223
_refine_ls_number_restraints     0
_refine_ls_R_factor_obs          0.0363
_refine_ls_shift/esd_max         0.0002
_refine_ls_shift/esd_mean        0.0000
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details     w=1/(\s^2^(F))
_refine_ls_weighting_scheme      sigma
_refine_ls_wR_factor_obs         0.0411
_reflns_number_observed          1223
_reflns_number_total             1250
_reflns_observed_criterion       I>3\s(I)
_cod_data_source_file            sh0100.cif
_cod_data_source_block           V
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_refine_ls_matrix_type' value 'Full' changed to 'full'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/n '
_cod_database_code               2105662