Exceptional dielectric performance induced by the stepwise reversible phase transitions of an organic crystal: betainium chlorodifluoroacetate
Zhihua Sun; Shuquan Zhang; Chengmin Ji; Tianliang Chen; Junhua Luo; Journal of Materials Chemistry C 2 (2014) 10337–10342; doi:10.1039/C4TC01925C

data_7233943
_publ_section_title
;
 Exceptional dielectric performance induced by the stepwise reversible
 phase transitions of an organic crystal: betainium chlorodifluoroacetate
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              10337
_journal_page_last               10342
_journal_paper_doi               10.1039/C4TC01925C
_journal_volume                  2
_journal_year                    2014
_chemical_formula_sum            'C7 H12 Cl F2 N O4'
_chemical_formula_weight         247.63
_space_group_IT_number           11
_space_group_name_Hall           '-P 2yb'
_space_group_name_H-M_alt        'P 1 21/m 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 1 21/m 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 94.896(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   5.8745(3)
_cell_length_b                   7.5347(3)
_cell_length_c                   12.7728(6)
_cell_measurement_reflns_used    1259
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      26.8710
_cell_measurement_theta_min      3.7060
_cell_volume                     563.29(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'SuperNova (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0269
_diffrn_reflns_av_sigmaI/netI    0.0325
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            2557
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.14
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.362
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.63095
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.460
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             256
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.37
_exptl_crystal_size_min          0.29
_refine_diff_density_max         0.768
_refine_diff_density_min         -0.689
_refine_diff_density_rms         0.076
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.095
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     91
_refine_ls_number_reflns         1070
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.095
_refine_ls_R_factor_all          0.1039
_refine_ls_R_factor_gt           0.0875
_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^)+(0.0405P)^2^+1.8535P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1755
_refine_ls_wR_factor_ref         0.1864
_reflns_number_gt                862
_reflns_number_total             1070
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1000003.cif
_cod_data_source_block           PCOD1000003
_cod_original_sg_symbol_H-M      P21/m
_cod_database_code               7233943