Organic salt of hydrogen l-tartaric acid: a novel wide-temperature-range ferroelectrics with a reversible phase transition
Wu, De-Hong; Ge, Jia-Zhen; Cai, Hong-Lin; Zhang, Wen; Xiong, Ren-Gen; CrystEngComm 13 (2011) 319–; doi:10.1039/c0ce00109k

data_7205147
_publ_section_title
;
 Organic salt of hydrogen l-tartaric acid: a novel
 wide-temperature-range ferroelectrics with a reversible phase
 transition
;
_journal_issue                   1
_journal_name_full               CrystEngComm
_journal_page_first              319
_journal_paper_doi               10.1039/c0ce00109k
_journal_volume                  13
_journal_year                    2011
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C8 H12 N, C4 H5 O6'
_chemical_formula_sum            'C12 H17 N O6'
_chemical_formula_weight         271.27
_space_group_IT_number           1
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  'P 1'
_symmetry_space_group_name_H-M   'P 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                95.338(2)
_cell_angle_beta                 91.9500(10)
_cell_angle_gamma                107.9160(10)
_cell_formula_units_Z            4
_cell_length_a                   7.4606(12)
_cell_length_b                   11.9298(18)
_cell_length_c                   14.8726(9)
_cell_measurement_reflns_used    3664
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      27.5087
_cell_measurement_theta_min      3.1892
_cell_volume                     1251.3(3)
_computing_cell_refinement       CrystalClear
_computing_data_collection       'CrystalClear (Rigaku, 2005)'
_computing_data_reduction        CrystalClear
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean 13.6612
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Mercury2 (2x2 bin mode)'
_diffrn_measurement_method       CCD_Profile_fitting
_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  0.0298
_diffrn_reflns_av_sigmaI/netI    0.0375
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            13753
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         3.11
_exptl_absorpt_coefficient_mu    0.116
_exptl_absorpt_correction_T_max  0.970
_exptl_absorpt_correction_T_min  0.962
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku, 2005)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.440
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             576
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.245
_refine_diff_density_min         -0.219
_refine_diff_density_rms         0.042
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   10(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.001
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     705
_refine_ls_number_reflns         5681
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.001
_refine_ls_R_factor_all          0.0495
_refine_ls_R_factor_gt           0.0386
_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^)+(0.0508P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0867
_refine_ls_wR_factor_ref         0.0929
_reflns_number_gt                4661
_reflns_number_total             5681
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            C0CE00109K.TXT
_cod_data_source_block           wudh_LTP(123K)
_cod_database_code               7205147