Methylammonium DL-tartrate monohydrate
Callear, Samantha K.; Hursthouse, Michael B.; Threlfall, Terence L.; Crystal Structure Report Archive  (2008) 578–; doi:

data_1519974
_publ_section_title
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 Methylammonium DL-tartrate monohydrate
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_journal_name_full               'Crystal Structure Report Archive'
_journal_page_first              578
_journal_year                    2008
_chemical_formula_sum            'C5 H13 N O7'
_chemical_formula_weight         199.16
_chemical_name_systematic
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Methylammonium DL-tartrate monohydrate
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_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 129.99(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   20.104(4)
_cell_length_b                   7.6296(15)
_cell_length_c                   15.302(3)
_cell_measurement_reflns_used    2051
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     1798.2(10)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_data_collection       'COLLECT (Hooft, R.W.W., 1998)'
_computing_data_reduction
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker-Nonius 95mm CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  '10cm confocal mirrors'
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0586
_diffrn_reflns_av_sigmaI/netI    0.0493
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            9619
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.98
_exptl_absorpt_coefficient_mu    0.139
_exptl_absorpt_correction_T_max  0.9931
_exptl_absorpt_correction_T_min  0.9862
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2.10 (Sheldrick, G.M., 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.471
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.326
_refine_diff_density_min         -0.251
_refine_diff_density_rms         0.061
_refine_ls_extinction_coef       0.0059(10)
_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   1.060
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     132
_refine_ls_number_reflns         2044
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0595
_refine_ls_R_factor_gt           0.0433
_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^)+(0.0378P)^2^+2.3275P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1027
_refine_ls_wR_factor_ref         0.1124
_reflns_number_gt                1617
_reflns_number_total             2044
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            eCrystal-578.cif
_cod_data_source_block           04mbh0603
_cod_depositor_comments
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Citation :
Callear, Samantha K. and Hursthouse, Michael B. and 
Threlfall, Terence L. (2008) 
University of Southampton, Crystal Structure Report Archive. 
(doi:10.5258/ecrystals/578)

More at:
http://ecrystals.chem.soton.ac.uk/578/
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_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1519974