A combined model of electron density and lattice dynamics refined against elastic diffraction data. Thermodynamic properties of crystalline <small>L</small>-alanine
Sovago, Ioana; Hoser, Anna A.; Madsen, Anders Ø.; Acta Crystallographica Section A 76 (2020) 32–44; doi:10.1107/S205327331901355X

data_2311104
_publ_section_title
;
 A combined model of electron density and lattice dynamics refined against
 elastic diffraction data. Thermodynamic properties of crystalline
 <small>L</small>-alanine
;
_journal_coeditor_code           AE5068
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section A'
_journal_page_first              32
_journal_page_last               44
_journal_paper_doi               10.1107/S205327331901355X
_journal_volume                  76
_journal_year                    2020
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C3 H7 N O2'
_chemical_formula_sum            'C3 H7 N O2'
_chemical_formula_weight         89.1
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.9534(5)
_cell_length_b                   12.2772(10)
_cell_length_c                   5.7882(5)
_cell_measurement_reflns_used    5997
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      58.0
_cell_measurement_theta_min      3.3
_cell_measurement_wavelength     0.71073
_cell_volume                     423.07(6)
_computing_molecular_graphics    'Volkov et al, (2006)'
_computing_publication_material  'Volkov et al, (2006)'
_computing_structure_refinement  'Volkov et al, (2006)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker Nonius X8 APEXII CCD area-detector'
_diffrn_measurement_method       '\w and \f'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0464
_diffrn_reflns_av_unetI/netI     0.027
_diffrn_reflns_Laue_measured_fraction_full 0.989
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            5997
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         57.97
_diffrn_reflns_theta_min         3.319
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.117
_exptl_absorpt_correction_T_max  0.7514
_exptl_absorpt_correction_T_min  0.6454
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker(2001)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.399
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rhombic
_exptl_crystal_F_000             192
_exptl_crystal_size_max          0.328
_exptl_crystal_size_mid          0.262
_exptl_crystal_size_min          0.184
_refine_diff_density_max         0.150
_refine_diff_density_min         -0.134
_refine_ls_extinction_coef       1.03(3)
_refine_ls_extinction_expression
;
        Becker, P.J. & Coppens, P. (1974) Acta Cryst., A30, 129-153.
;
_refine_ls_extinction_method     'Becker-Coppens type 1 Lorentzian isotropic'
_refine_ls_goodness_of_fit_ref   1.146
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     130
_refine_ls_number_reflns         6000
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.018
_refine_ls_R_factor_gt           0.018
_refine_ls_shift/su_max          0.00003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
        calc w2 = 1/[s^2^(Fo^2^)]
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.038
_reflns_Friedel_coverage         0.773
_reflns_Friedel_fraction_full    1
_reflns_Friedel_fraction_max     0.994
_reflns_number_gt                5719
_reflns_number_total             5997
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ae5068sup1.cif
_cod_data_source_block           xd
_cod_depositor_comments
'Adding full bibliography for 2311101--2311106.cif.'
_cod_database_code               2311104
_cod_database_fobs_code          2311104