Polar symmetry in new high-pressure phases of chloroform and bromoform.
Dziubek, Kamil F.; Katrusiak, Andrzej; The journal of physical chemistry. B 112 (2008) 12001–12009; doi:10.1021/jp8020134

data_1504396
_publ_section_title
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 Polar symmetry in new high-pressure phases of chloroform and bromoform.
;
_journal_issue                   38
_journal_name_full               'The journal of physical chemistry. B'
_journal_page_first              12001
_journal_page_last               12009
_journal_paper_doi               10.1021/jp8020134
_journal_volume                  112
_journal_year                    2008
_chemical_formula_moiety         'C H Br3'
_chemical_formula_sum            'C H Br3'
_chemical_formula_weight         252.75
_chemical_melting_point          281
_chemical_name_common            bromoform
_chemical_name_systematic        tribromomethane
_space_group_IT_number           173
_symmetry_cell_setting           hexagonal
_symmetry_Int_Tables_number      173
_symmetry_space_group_name_Hall  'P 6c'
_symmetry_space_group_name_H-M   'P 63'
_atom_sites_solution_hydrogens   geom
_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                120.00
_cell_formula_units_Z            2
_cell_length_a                   6.3229(15)
_cell_length_b                   6.3229(15)
_cell_length_c                   7.285(14)
_cell_measurement_reflns_used    861
_cell_measurement_temperature    293(2)
_cell_volume                     252.2(5)
_computing_cell_refinement       'CrysAlisRED (Oxford Diffraction, 2004)'
_computing_data_collection       'CrysAlisCCD (Oxford Diffraction, 2004)'
_computing_data_reduction
'CrysAlisRED (Oxford Diffraction, 2004); REDSHABS (Katrusiak, A.  2003)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.478
_diffrn_measured_fraction_theta_max 0.478
_diffrn_measurement_device_type  'KM-4 CCD'
_diffrn_measurement_method       '\f- and \w-scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1884
_diffrn_reflns_av_sigmaI/netI    0.0767
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       3
_diffrn_reflns_limit_l_min       -3
_diffrn_reflns_number            2068
_diffrn_reflns_theta_full        29.36
_diffrn_reflns_theta_max         29.36
_diffrn_reflns_theta_min         3.72
_diffrn_source                   'fine-focus sealed tube'
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    23.797
_exptl_absorpt_correction_T_max  0.17
_exptl_absorpt_correction_T_min  0.07
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
; 
 Corrections for absorption of the diamond-anvil cell and the sample 
 were made using program REDSHABS [Katrusiak, A. (2003) REDSHABS. Adam
 Mickiewicz University Pozna\'n; Katrusiak, A. (2004) Z. Kristallogr.
 219, 461-467].
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    3.328
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cylinder
_exptl_crystal_F_000             224
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.42
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.506
_refine_diff_density_min         -0.462
_refine_diff_density_rms         0.124
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(3)
_refine_ls_extinction_coef       0.15(2)
_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   0.907
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     13
_refine_ls_number_reflns         196
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.904
_refine_ls_R_factor_all          0.0611
_refine_ls_R_factor_gt           0.0407
_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^)+(0.0750P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1051
_refine_ls_wR_factor_ref         0.1156
_reflns_number_gt                145
_reflns_number_total             196
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jp8020134_si_001.cif
_cod_data_source_block           bromoform_0_20_GPa
_cod_depositor_comments
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The following automatic conversions were performed:
'_atom_site_symetry_multiplicity' tag replaced with
'_atom_site_symmetry_multiplicity'.

Automatic conversion script
Id: cif_correct_tags 1440 2010-10-19 06:21:57Z saulius 
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_cod_database_code               1504396