#------------------------------------------------------------------------------
#$Date: 2023-09-18 14:42:39 +0300 (Mon, 18 Sep 2023) $
#$Revision: 286386 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/31/22/2312295.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_2312295
loop_
_publ_author_name
'Khouchen, Malak'
'Klar, Paul Benjamin'
'Chintakindi, Hrushikesh'
'Suresh, Ashwin'
'Palatinus, Lukas'
_publ_section_title
;
 Optimal estimated standard uncertainties of reflection intensities for
 kinematical refinement from 3D electron diffraction data
;
_journal_coeditor_code           PL5027
_journal_issue                   5
_journal_name_full
'Acta Crystallographica Section A Foundations and Advances'
_journal_page_first              427
_journal_page_last               439
_journal_paper_doi               10.1107/S2053273323005053
_journal_volume                  79
_journal_year                    2023
_chemical_absolute_configuration rm
_chemical_formula_sum            'C3 H7 N O2'
_chemical_formula_weight         89.1
_chemical_name_common            DL-alanine
_chemical_name_systematic        DL-alanine
_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'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.7733(11)
_cell_length_b                   5.9524(12)
_cell_length_c                   12.2465(2)
_cell_measurement_reflns_used    3329
_cell_measurement_temperature    100
_cell_measurement_theta_max      1.44
_cell_measurement_theta_min      0.12
_cell_volume                     420.85(12)
_computing_cell_refinement       PETS2
_computing_data_collection       'self-written scripts, OLYMPUS iTEM'
_computing_data_reduction        PETS2
_computing_molecular_graphics    'VESTA 3'
_computing_structure_refinement  Jana2020
_computing_structure_solution    superflip
_diffrn_ambient_temperature      100
_diffrn_detector                 ASI
_diffrn_measured_fraction_theta_full 0.84
_diffrn_measured_fraction_theta_max 0.55
_diffrn_measurement_device       'TEM FEI Tecnai G2 20'
_diffrn_measurement_method       'continuous-rotation 3D ED'
_diffrn_measurement_specimen_support 'holey carbon grid'
_diffrn_radiation_probe          electron
_diffrn_radiation_source         'Lab6 cathode'
_diffrn_radiation_type           'electrons 200 keV'
_diffrn_radiation_wavelength     0.0251
_diffrn_reflns_av_R_equivalents  0.0992
_diffrn_reflns_av_unetI/netI     0.1016
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            3329
_diffrn_reflns_theta_full        1.09
_diffrn_reflns_theta_max         1.44
_diffrn_reflns_theta_min         0.12
_exptl_crystal_density_diffrn    1.4061
_exptl_crystal_description       'irregular shape'
_exptl_crystal_F_000             69.628
_refine_diff_density_max         0.20
_refine_diff_density_min         -0.18
_refine_ls_extinction_coef       27(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2017/1 (Sheldrick, 2015)'
_refine_ls_goodness_of_fit_gt    2.5481
_refine_ls_goodness_of_fit_ref   2.3621
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_constraints    63
_refine_ls_number_parameters     56
_refine_ls_number_reflns         1123
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.1416
_refine_ls_R_factor_gt           0.1306
_refine_ls_shift/su_max          0.0384
_refine_ls_shift/su_mean         0.0052
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[σ²(Fo²)+(0.02P)²+0.0000P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      sigma
_refine_ls_wR_factor_gt          0.2990
_refine_ls_wR_factor_ref         0.3049
_reflns_number_gt                927
_reflns_number_total             1123
_reflns_threshold_expression     I>3σ(I)
_cod_data_source_file            pl5027.cif
_cod_data_source_block           L-alanine_model3_outliers
_cod_original_cell_volume        420.85(14)
_cod_original_sg_symbol_Hall     'P 2xab;2ybc;2zac'
_cod_database_code               2312295
loop_
_space_group_symop_id
_space_group_symop_operation_xyz
1 x,y,z
2 -x+1/2,-y,z+1/2
3 -x,y+1/2,-z+1/2
4 x+1/2,-y+1/2,-z
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_adp_type
_atom_site_U_iso_or_equiv
_atom_site_site_symmetry_multiplicity
_atom_site_occupancy
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_assembly
_atom_site_disorder_group
O1 O -0.1249(5) 0.7273(9) 0.4160(3) Uani 0.0176(10) 4 1 d . . .
O2 O -0.2613(4) 0.4449(8) 0.3155(2) Uani 0.0149(9) 4 1 d . . .
C1 C -0.1018(5) 0.5558(9) 0.3600(3) Uani 0.0109(10) 4 1 d . . .
C2 C 0.1935(6) 0.2656(11) 0.4097(3) Uani 0.0188(13) 4 1 d . . .
N1 N 0.3149(5) 0.6527(8) 0.3623(3) Uani 0.0135(9) 4 1 d . . .
C3 C 0.1454(5) 0.4701(9) 0.3390(3) Uani 0.0119(10) 4 1 d . . .
H1c3 H 0.162343 0.422281 0.256023 Uani 0.0143 4 1 d . . .
H1c2 H 0.365583 0.210003 0.396279 Uani 0.0226 4 1 d . . .
H2c2 H 0.07621 0.135376 0.389019 Uani 0.0226 4 1 d . . .
H3c2 H 0.172249 0.308802 0.493053 Uani 0.0226 4 1 d . . .
H1n1 H 0.289925 0.780649 0.309432 Uani 0.0162 4 1 d . . .
H2n1 H 0.292019 0.708556 0.439467 Uani 0.0162 4 1 d . . .
H3n1 H 0.47758 0.592824 0.353903 Uani 0.0162 4 1 d . . .
loop_
_atom_type_symbol
_atom_type_scat_source
C International_Tables_Vol_C
H International_Tables_Vol_C
N International_Tables_Vol_C
O International_Tables_Vol_C
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_2
_geom_angle_site_symmetry_3
_geom_angle
O1 C1 O2 . . . 126.5(4)
O1 C1 C3 . . . 117.8(3)
O2 C1 C3 . . . 115.7(4)
C3 C2 H1c2 . . . 109.47
C3 C2 H2c2 . . . 109.47
C3 C2 H3c2 . . . 109.47
H1c2 C2 H2c2 . . . 109.47
H1c2 C2 H3c2 . . . 109.47
H2c2 C2 H3c2 . . . 109.47
C3 N1 H1n1 . . . 109.47
C3 N1 H2n1 . . . 109.47
C3 N1 H3n1 . . . 109.47
H1n1 N1 H2n1 . . . 109.47
H1n1 N1 H3n1 . . . 109.47
H2n1 N1 H3n1 . . . 109.47
C1 C3 C2 . . . 109.9(3)
C1 C3 N1 . . . 109.6(4)
C1 C3 H1c3 . . . 109.55
C2 C3 N1 . . . 110.8(3)
C2 C3 H1c3 . . . 108.32
N1 C3 H1c3 . . . 108.61
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_1
_geom_bond_site_symmetry_2
_geom_bond_distance
O1 C1 . . 1.237(7)
O2 C1 . . 1.257(5)
C1 C3 . . 1.537(5)
C2 C3 . . 1.519(7)
C2 H1c2 . . 1.06
C2 H2c2 . . 1.06
C2 H3c2 . . 1.06
N1 C3 . . 1.490(6)
N1 H1n1 . . 1.01
N1 H2n1 . . 1.01
N1 H3n1 . . 1.01
C3 H1c3 . . 1.06
loop_
_geom_hbond_atom_site_label_D
_geom_hbond_atom_site_label_H
_geom_hbond_atom_site_label_A
_geom_hbond_site_symmetry_D
_geom_hbond_site_symmetry_H
_geom_hbond_site_symmetry_A
_geom_hbond_distance_DH
_geom_hbond_distance_HA
_geom_hbond_distance_DA
_geom_hbond_angle_DHA
C3 H1c3 O1 . . 3_545 1.06 2.41 3.443(5) 163.19
N1 H1n1 O2 . . 3_555 1.01 1.82 2.804(5) 162.82
N1 H2n1 O1 . . 4_566 1.01 1.87 2.829(5) 156.55
N1 H3n1 O2 . . 1_655 1.01 1.81 2.801(4) 166.89
N1 H3n1 C1 . . 1_655 1.01 2.44 3.417(4) 162.66
