Methylammonium L-tartrate
Callear, Samantha K.; Hursthouse, Michael B.; Threlfall, Terence L.; Crystal Structure Report Archive  (2008) 579–; doi:

data_1519975
_publ_section_title
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 Methylammonium L-tartrate
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_journal_name_full               'Crystal Structure Report Archive'
_journal_page_first              579
_journal_year                    2008
_chemical_formula_sum            'C5 H11 N O6'
_chemical_formula_weight         181.15
_chemical_name_systematic
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Methylammonium L-tartrate
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_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
_cell_angle_alpha                78.735(8)
_cell_angle_beta                 83.330(10)
_cell_angle_gamma                79.077(11)
_cell_formula_units_Z            1
_cell_length_a                   5.1580(5)
_cell_length_b                   5.3261(7)
_cell_length_c                   7.5218(6)
_cell_measurement_reflns_used    880
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     198.31(4)
_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 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'BrukerNonius 95mm CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0369
_diffrn_reflns_av_sigmaI/netI    0.0319
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            4311
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         3.96
_exptl_absorpt_coefficient_mu    0.141
_exptl_absorpt_correction_T_max  0.9972
_exptl_absorpt_correction_T_min  0.9724
_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    1.517
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       lath
_exptl_crystal_F_000             96
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.226
_refine_diff_density_min         -0.189
_refine_diff_density_rms         0.048
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   10(10)
_refine_ls_extinction_coef       0.19(3)
_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   1.079
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     116
_refine_ls_number_reflns         905
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.0381
_refine_ls_R_factor_gt           0.0330
_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^)+(0.0410P)^2^+0.0422P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0743
_refine_ls_wR_factor_ref         0.0779
_reflns_number_gt                840
_reflns_number_total             905
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            eCrystal-579.cif
_cod_data_source_block           05skc0002p1
_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/579)

More at:
http://ecrystals.chem.soton.ac.uk/579/
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_cod_original_sg_symbol_H-M      P1
_cod_database_code               1519975