############################################################################## # # # H.D. Flack's Single-Crystal Raw Data Diffractometry Dictionary # # --------------------- # # # # CIF data definitions specifically for single-crystal raw diffraction # # data applications. # # These are in addition to those defined in the CIF Core Dictionary 1996, # # (cif_core.dic version 2.0.1) # # # # The DDL commands used in this dictionary are defined in "ddl_core.dic". # # # ############################################################################## data_on_this_dictionary _dictionary_name cif_rawxtal.dic _dictionary_version 0.001 _dictionary_update 1997-02-05 _dictionary_history ; 1997-02-05 Initial definitions H.D. Flack ; data_diffrn_radiation_polarisn_fract _name '_diffrn_radiation_polarisn_fract' _category diffrn_radiation _type numb _list both _list_reference '_diffrn_radiation_wavelength_id' _enumeration_range 0.0:1.0 _definition ; Polarisation fraction of the radiation incident on the crystal. It is the ratio of the intensity of the perpendicularly polarised component to the sum of the intensities of the perpendicularly polarised and the parallel polarised components of the radiation incident on the crystal. ; data_diffrn_refln_fbcoeff_ loop_ _name '_diffrn_refln_fbcoeff_peak' '_diffrn_refln_fbcoeff_bg_peak' '_diffrn_refln_fbcoeff_bg_1' '_diffrn_refln_fbcoeff_bg_2' _category diffrn_refln _type numb _list yes _list_reference '_diffrn_refln_index_' _enumeration_range 0: _definition ; The measurement coefficients c~p~, c~b~, c~l~ and c~h~ defined in DIFRAC, Single-Crystal Diffractometer Output-Conversion Software by Flack, H. D., Blanc, E. & Schwarzenbach, D. (1992). J. Appl. Cryst. 25, 455-459. ; data_diffrn_refln_scan_mode_factor _name '_diffrn_refln_scan_mode_factor' _category diffrn_refln _type numb _list yes _list_reference '_diffrn_refln_index_' _enumeration_range 0: _definition ; The ratio of the angular speed of rotation of the 2\q circle to that of the \w circle during a reflection scan. For an \w scan this value is 0 and for an \w-2\q scan it is 2.0 but for these two common scans it is preferable to use _diffrn_refln_scan_mode ; #eof-eof-eof-eof-eof-eof-eof-eof-eof-eof-eof-eof-eof-eof-eof-eof-eof-eof-eof