International
Tables for
Crystallography
Volume G
Definition and exchange of crystallographic data
Edited by S. R. Hall and B. McMahon

International Tables for Crystallography (2006). Vol. G. ch. 5.7, pp. 564-566
https://doi.org/10.1107/97809553602060000757

Appendix A5.7.1. Request list for Acta Crystallographica Section C

P. R. Strickland,a M. A. Hoylanda and B. McMahona*

a International Union of Crystallography, 5 Abbey Square, Chester CH1 2HU, England
Correspondence e-mail:  bm@iucr.org

Table A5.7.1.1[link] contains the request list for Acta Crystallographica Section C as given in the 2005 Notes for Authors. This list is appropriate for a single-crystal X-ray diffraction study and gives all the data items that are displayed in an article if they are present in the CIF. In principle, a smaller set of mandatory data items could be supplied as a separate request list. However, certain items may be considered mandatory or not depending on the nature of the study and on the presence of other data items in the CIF, so checking for mandatory items is performed through higher-level algorithmic checks during the pre-submission validation stage.

Table A5.7.1.1| top | pdf |
Request list for Acta Crystallographica Section C

(a) Data names relating to the text of an article
_publ_contact_author_nameContact author's name
_publ_contact_author_addressContact author's address
_publ_contact_author_emailE-mail address to be published
_publ_contact_author_faxFor editorial communications
_publ_contact_author_phoneFor editorial communications
_publ_contact_letterLetter of submission, with date
_publ_requested_journal`Acta Crystallographica Section C'
_publ_requested_categoryPublication choice (FI, FM, FO, AD)
_publ_section_titleTitle of paper
_publ_section_title_footnoteFootnote to title of paper
_publ_author_nameList of author(s) name(s)
_publ_author_footnoteFootnote(s) to author(s) name(s)
_publ_author_addressAuthor(s) address(es)
_publ_section_synopsisSynopsis for compounds that cannot be shown as a chemical diagram
_publ_section_abstractAbstract of paper in English
_publ_section_commentDiscussion of study
_publ_section_acknowledgementsAcknowledgements
_publ_section_referencesReferences
_publ_section_figure_captionsLegends to figures
  
(b) Data names relating to the experimental data
_publ_section_exptl_prepCompound preparation details
_chemical_formula_sumChemical formula as sum of elements
_chemical_formula_moietyChemical formula in moieties
_chemical_formula_weightChemical formula mass (Da)
_chemical_melting_pointMelting point (K)
_symmetry_cell_settingCode for cell setting
_symmetry_space_group_name_H-MSpace-group symbol, including unique axis
_symmetry_equiv_pos_as_xyzEquivalent positions in order used by _geom_
_cell_length_aUnit-cell lengths (Å)
_cell_length_b
_cell_length_c
_cell_angle_alphaUnit-cell angles (°)
_cell_angle_beta
_cell_angle_gamma
_cell_volumeUnit-cell volume (Å3)
_cell_formula_units_ZNumber of formulae per unit cell
_exptl_crystal_density_diffrnDensity calculated from unit cell and contents (Mg m−3)
_exptl_crystal_density_measDensity measured experimentally (Mg m−3)
_exptl_crystal_density_methodMethod used to measure density experimentally
_diffrn_radiation_typeRadiation type (e.g. neutron or MoKα)
_diffrn_radiation_wavelengthRadiation wavelength (Å)
_cell_measurement_reflns_usedNumber of reflections used to measure unit cell
_cell_measurement_theta_minMinimum [\theta] of reflections used to measure unit cell (°)
_cell_measurement_theta_maxMaximum [\theta] of reflections used to measure unit cell (°)
_cell_measurement_temperatureMeasurement temperature (K)
_exptl_absorpt_coefficient_muLinear absorption coefficient (mm−1)
_exptl_crystal_descriptionCrystal habit description
_exptl_crystal_size_maxMaximum dimension of crystal (mm)
_exptl_crystal_size_midMedial dimension of crystal (mm)
_exptl_crystal_size_minMinimum dimension of crystal (mm)
_exptl_crystal_size_radRadius of spherical or cylindrical crystal (mm)
_exptl_crystal_colourCrystal colour
_diffrn_measurement_device_typeDiffractometer make and type
_diffrn_measurement_methodMode of intensity measurement and scan
_diffrn_detector_area_resol_meanResolution of area detector (pixels mm−1)
_exptl_absorpt_correction_typeCode for absorption correction
_exptl_absorpt_process_detailsLiterature reference for absorption correction [e.g. `(North et al., 1968)']
_exptl_absorpt_correction_T_minMinimum transmission factor from corrections
_exptl_absorpt_correction_T_maxMaximum transmission factor from corrections
_diffrn_reflns_numberTotal number of reflections measured
_reflns_number_totalNumber of symmetry-independent reflections
_reflns_number_gtNumber of reflections > σ threshold
_reflns_threshold_expressionσ expression for F, F2 or I threshold
_diffrn_reflns_theta_maxMaximum [\theta] of measured reflections (°)
_diffrn_reflns_theta_full[\theta] to which available reflections are `complete' (°)
_diffrn_measured_fraction_theta_maxFraction of unique reflections measured to [\theta_{\rm max}]
_diffrn_measured_fraction_theta_fullFraction of unique reflections measured to [\theta_{\rm full}]
_diffrn_reflns_av_R_equivalentsR factor for symmetry-equivalent intensities
_diffrn_reflns_limit_h_minMinimum/maximum h index of measured data
_diffrn_reflns_limit_h_max
_diffrn_reflns_limit_k_minMinimum/maximum k index of measured data
_diffrn_reflns_limit_k_max
_diffrn_reflns_limit_l_minMinimum/maximum l index of measured data
_diffrn_reflns_limit_l_max
_diffrn_standards_numberNumber of standards used in measurement
_diffrn_standards_interval_countNumber of measurements between standards
_diffrn_standards_interval_timeTime (min) between standards
_diffrn_standards_decay_%Percentage decrease in standards intensity
_refine_ls_structure_factor_coefCode for F, F2 or I used in least-squares refinement
_refine_ls_R_factor_gtR factor of F for reflections > threshold
_refine_ls_wR_factor_refR factor of coefficient for refinement reflections
_refine_ls_goodness_of_fit_refGoodness of fit S for refinement reflections
_refine_ls_number_reflnsNumber of reflections used in refinement
_refine_ls_number_parametersNumber of parameters refined
_refine_ls_weighting_schemeCode for weight type
_refine_ls_weighting_detailsWeighting expression
_refine_ls_hydrogen_treatmentCode for H-atom treatment
_refine_ls_shift/su_maxMaximum shift/s.u. ratio after final refinement cycle
_refine_diff_density_maxMaximum/minimum values of final difference map (e Å−3)
_refine_diff_density_min
_refine_ls_extinction_methodDescription of extinction methods applied
_refine_ls_extinction_coefExtinction coefficient applied in corrections
_refine_ls_abs_structure_detailsAbsolute structure method and Friedel-pair number
_refine_ls_abs_structure_FlackMeasure of absolute structure
_refine_ls_abs_structure_RogersMeasure of absolute structure
_publ_section_exptl_refinementSpecial details of the refinement
_computing_data_collectionReference to data-collection software
_computing_cell_refinementReference to cell-refinement software
_computing_data_reductionReference to data-reduction software
_computing_structure_solutionReference to structure-solution software
_computing_structure_refinementReference to structure-refinement software
_computing_molecular_graphicsReference to visualization software
_computing_publication_materialReference to publication preparation software
  
loop_ 
_atom_type_symbolAtom type symbol (usually element symbol)
_atom_type_descriptionDescription of atom type
_atom_type_scat_sourceReference to scattering factors applied
_atom_type_scat_dispersion_realReal anomalous-dispersion value applied
_atom_type_scat_dispersion_imagImaginary anomalous-dispersion value applied
  
loop_ 
_atom_site_labelUnique label identifying the atom site
_atom_site_fract_xFractional coordinates of atom site
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equivIsotropic atomic displacement parameter, or equivalent from anisotropic atomic displacement parameters
_atom_site_occupancyOccupancy fraction for site (default is 1.0)
_atom_site_disorder_assemblyCode that identifies functional group suffering disorder
_atom_site_disorder_groupCode that identifies disorder group
_atom_site_adp_typeAtomic displacement parameter type
  
loop_ 
_atom_site_aniso_labelUnique label identifying the atom site
_atom_site_aniso_U_11Elements of anisotropic atomic displacement parameter tensor
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
  
loop_ 
_geom_bond_atom_site_label_1Labels identifying the atom sites 1 and 2
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_1Symmetry codes (e.g. 2_554) for atom sites 1 and 2
_geom_bond_site_symmetry_2
_geom_bond_distanceDistance between atom sites 1 and 2 (Å)
_geom_bond_publ_flagFlag for print request (yes or no)
  
loop_ 
_geom_angle_atom_site_label_1Labels identifying the atom sites 1, 2 and 3
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle_site_symmetry_1Symmetry codes for atom sites 1, 2 and 3
_geom_angle_site_symmetry_2
_geom_angle_site_symmetry_3
_geom_angleAngle between atom sites 1, 2 and 3 (°)
_geom_angle_publ_flagFlag for print request (yes or no)
  
loop_ 
_geom_torsion_atom_site_label_1Labels identifying the atom sites 1, 2, 3 and 4
_geom_torsion_atom_site_label_2
_geom_torsion_atom_site_label_3
_geom_torsion_atom_site_label_4
_geom_torsion_site_symmetry_1Symmetry codes for atom sites 1, 2, 3 and 4
_geom_torsion_site_symmetry_2
_geom_torsion_site_symmetry_3
_geom_torsion_site_symmetry_4
_geom_torsionTorsion angle between atom sites 1, 2, 3 and 4 (°)
_geom_torsion_publ_flagFlag for print request (yes or no)
  
loop_ 
_geom_hbond_atom_site_label_DDonor-atom label in hydrogen bond
_geom_hbond_atom_site_label_HH-atom label in hydrogen bond
_geom_hbond_atom_site_label_AAcceptor-atom label in hydrogen bond
_geom_hbond_site_symmetry_DSymmetry code for donor site
_geom_hbond_site_symmetry_HSymmetry code for H-atom site
_geom_hbond_site_symmetry_ASymmetry code for acceptor site
_geom_hbond_distance_DHDonor atom-to-H-atom distance (Å)
_geom_hbond_distance_HAH-atom-to-acceptor atom distance (Å)
_geom_hbond_distance_DADonor atom-to-acceptor atom distance (Å)
_geom_hbond_angle_DHADonor to H to acceptor angle (°)
_geom_hbond_publ_flagFlag for print request (yes or no)
  
(c) Data names for adding items to the standard request list
loop_ 
_publ_manuscript_incl_extra_itemAdditional CIF item submitted for publication
_publ_manuscript_incl_extra_defnIs item defined in core dictionary? (yes or no)
  
(d) Data names for structure-factor lists
loop_ 
_refln_index_hMiller indices h, k and l
_refln_index_k
_refln_index_l
_refln_F_measMeasured F
_refln_F_squared_meas§Measured F2
_refln_F_sigmaStandard uncertainty of F
_refln_F_squared_sigma§Standard uncertainty of F2
_refln_F_calcCalculated F
_refln_F_squared_calc§Calculated F2
Alternative to _diffrn_standards_interval_count.
Alternative to _refine_ls_abs_structure_Flack.
§Alternative to the corresponding data name without `squared'.








































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