Core dictionary (coreCIF)

Hall, Sydney R.; Allen, Frank H.; Brown, I. David; Toby, Brian H.; Hester, James R.; Vaitkus, Antanas; Rowles, Matthew R.; Bollinger, John C.; Rainer, Daniel N.; McMahon, Brian

doi:10.1107/97809553602060001011

RELATED SITES: IUCr | IUCr Journals

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

International Tables for Crystallography (2026). Vol. G. Early view chapter
https://doi.org/10.1107/97809553602060001011

Chapter 4.2 Core dictionary (coreCIF)

CIF_CORE_HEAD > DIFFRACTION > DIFFRN > DIFFRN_RADIATION

Index

Core dictionary version 3.3.0

_diffrn_radiation.illumination_mode

Name:
_diffrn_radiation.illumination_mode

Definition:

   
    Code describing the optical configuration of the incident beam at
    the sample. For electron diffraction, parallel illumination is
    the normal mode in transmission electron microscopy (TEM),
    convergent-beam in scanning transmission electron microscopy
    (STEM).

Type: Code

The data value must be one of the following:

convergent Convergent-beam illumination

parallel Parallel illumination

Category:
diffrn_radiation

International Tables for Crystallography (2026). Vol. G. Chapter 4.2
https://doi.org/10.1107/97809553602060001011