<small>DL</small>-Histidine <small>DL</small>-tartrate
Johnson, M. N.; Feeder, N.; Acta Crystallographica Section E 60 (2004) o1273–o1274; doi:10.1107/S1600536804015296

data_2203895
_publ_section_title
;
 <small>DL</small>-Histidine <small>DL</small>-tartrate
;
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1273
_journal_page_last               o1274
_journal_paper_doi               10.1107/S1600536804015296
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          'C6 H10 N3 O2 +, C4 H5 O6 -'
_chemical_formula_moiety         'C6 H10 N3 O2 +, C4 H5 O6 -'
_chemical_formula_sum            'C10 H15 N3 O8'
_chemical_formula_weight         305.25
_chemical_name_common            'DL-histidine DL-tartrate'
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.253(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.9695(5)
_cell_length_b                   13.4392(12)
_cell_length_c                   19.2749(18)
_cell_measurement_reflns_used    2967
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      28.02
_cell_measurement_theta_min      1.85
_cell_volume                     1287.3(2)
_computing_cell_refinement       'SAINT (Siemens, 1994)'
_computing_data_collection       'SMART (Siemens, 1994)'
_computing_data_reduction        SAINT
_computing_molecular_graphics
' ORTEP-3 (Farrugia, 1997) and Materials Studio (Accelrys, 2001)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_detector_area_resol_mean 67
_diffrn_measured_fraction_theta_full 0.949
_diffrn_measured_fraction_theta_max 0.949
_diffrn_measurement_device_type  'Bruker SMART APEX CCD'
_diffrn_measurement_method       'Thin-slice \w'
_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  0.0226
_diffrn_reflns_av_sigmaI/netI    0.0333
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            7512
_diffrn_reflns_theta_full        28.02
_diffrn_reflns_theta_max         28.02
_diffrn_reflns_theta_min         1.85
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.138
_exptl_absorpt_correction_T_max  0.990
_exptl_absorpt_correction_T_min  0.843
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1997; Blessing, 1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.575
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needle
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.435
_refine_diff_density_min         -0.207
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     194
_refine_ls_number_reflns         2967
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0584
_refine_ls_R_factor_gt           0.0435
_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^)+(0.0666P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1133
_refine_ls_wR_factor_ref         0.1184
_reflns_number_gt                2207
_reflns_number_total             2967
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            dn6150.cif
_cod_data_source_block           I
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_Hall     -P2ybc
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2203895
_cod_database_fobs_code          2203895