Strong negative thermal expansion and relaxor ferroelectricity driven by supramolecular patterns
Marek Szafranski; Journal of Materials Chemistry C 1 (2012) 7904–7913; doi:10.1039/C3TC31609B

data_7233561
_publ_section_title
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 Strong negative thermal expansion and relaxor ferroelectricity driven by
 supramolecular patterns
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_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              7904
_journal_page_last               7913
_journal_paper_doi               10.1039/C3TC31609B
_journal_volume                  1
_journal_year                    2012
_chemical_formula_sum            'C6 H13 Cl N2'
_chemical_formula_weight         148.63
_chemical_name_common            'dabco hydrochloride'
_chemical_name_systematic        '1,4diazabicyclo[2.2.2]octane hydrochloride'
_space_group_IT_number           36
_space_group_name_Hall           'C 2c -2'
_space_group_name_H-M_alt        'C m c 21'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'C m c 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.2633(2)
_cell_length_b                   10.06450(10)
_cell_length_c                   10.0786(2)
_cell_measurement_temperature    120.0(1)
_cell_volume                     736.76(3)
_computing_cell_refinement       CrysalisPro
_computing_data_collection       CrysalisPro
_computing_data_reduction        CrysalisPro
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120.0(1)
_diffrn_measured_fraction_theta_full 0.965
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_device_type  'Gemini A Ultra'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0189
_diffrn_reflns_av_sigmaI/netI    0.0247
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            5184
_diffrn_reflns_theta_full        37.38
_diffrn_reflns_theta_max         37.38
_diffrn_reflns_theta_min         3.46
_exptl_absorpt_coefficient_mu    0.431
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.340
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             320
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.48
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.278
_refine_diff_density_min         -0.156
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     76
_refine_ls_number_reflns         1899
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.076
_refine_ls_R_factor_all          0.0280
_refine_ls_R_factor_gt           0.0257
_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^)+(0.0335P)^2^+0.0275P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0610
_refine_ls_wR_factor_ref         0.0624
_reflns_number_gt                1828
_reflns_number_total             1899
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1000001.cif
_cod_data_source_block           PCOD1000001
_cod_depositor_comments
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The following automatic conversions were performed:

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

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
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_cod_original_sg_symbol_H-M      Cmc2(1)
_cod_database_code               7233561