Optimal estimated standard uncertainties of reflection intensities for kinematical refinement from 3D electron diffraction data
Khouchen, Malak; Klar, Paul Benjamin; Chintakindi, Hrushikesh; Suresh, Ashwin; Palatinus, Lukas; Acta Crystallographica Section A Foundations and Advances 79 (2023) 427–439; doi:10.1107/S2053273323005053

data_2312289
_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            'C13 H18 O2'
_chemical_formula_weight         206.3
_chemical_name_common            (S)-(+)-Ibuprofen
_chemical_name_systematic
; 
(S)-(+)-Ibuprofen
;
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      4
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_cell_angle_alpha                90
_cell_angle_beta                 112.24(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.368(4)
_cell_length_b                   8.021(3)
_cell_length_c                   13.536(5)
_cell_measurement_reflns_used    3884
_cell_measurement_temperature    95.15
_cell_measurement_theta_max      0.72
_cell_measurement_theta_min      0.06
_cell_volume                     1242.9(8)
_computing_cell_refinement       'PETS2(ver 2.2.20220612.1425)'
_computing_data_collection       'self-written scripts, OLYMPUS iTEM'
_computing_data_reduction        'PETS2(ver 2.2.20220612.1425)'
_computing_molecular_graphics    'VESTA 3'
_computing_structure_refinement  'JANA2020 '
_computing_structure_solution    superflip
_diffrn_ambient_temperature      95.15
_diffrn_detector
'Hybrid pixel detector ASI Cheetah (side-mounted)'
_diffrn_measured_fraction_theta_full 0.85
_diffrn_measured_fraction_theta_max 0.85
_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  0.1658
_diffrn_reflns_av_unetI/netI     0.1582
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3884
_diffrn_reflns_theta_full        0.72
_diffrn_reflns_theta_max         0.72
_diffrn_reflns_theta_min         0.06
_exptl_crystal_density_diffrn    1.1024
_exptl_crystal_description       block
_exptl_crystal_F_000             184.42
_refine_diff_density_max         0.26
_refine_diff_density_min         -0.27
_refine_ls_extinction_coef       3.3(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2017/1 (Sheldrick, 2015)'
_refine_ls_goodness_of_fit_gt    2.5278
_refine_ls_goodness_of_fit_ref   2.3603
_refine_ls_hydrogen_treatment    mixed
_refine_ls_number_constraints    139
_refine_ls_number_parameters     127
_refine_ls_number_reflns         1212
_refine_ls_number_restraints     3
_refine_ls_R_factor_all          0.2120
_refine_ls_R_factor_gt           0.1901
_refine_ls_shift/su_max          0.0312
_refine_ls_shift/su_mean         0.0045
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details     w=1/(\s^2^(I)+0.0004I^2^)
_refine_ls_weighting_scheme      sigma
_refine_ls_wR_factor_gt          0.3890
_refine_ls_wR_factor_ref         0.4097
_reflns_number_gt                957
_reflns_number_total             1212
_reflns_threshold_expression     I>3\s(I)
_cod_data_source_file            pl5027.cif
_cod_data_source_block           ibuprofen_model3
_cod_database_code               2312289