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International
Tables for Crystallography Volume G Definition and exchange of crystallographic data Edited by J. R. Hester and B. McMahon © International Union of Crystallography 2026 |
International Tables for Crystallography (2026). Vol. G. Early view chapter
https://doi.org/10.1107/97809553602060001011 Chapter 4.2 Core dictionary (coreCIF) |
Core dictionary version 3.3.0
_refln.class_code
Name:_refln.class_code
Alias:
_refln_class_code
Definition:
Code identifying the class to which this reflection has been
assigned. This code must match a value of _reflns_class.code.
Reflections may be grouped into classes for a variety of
purposes. For example, for modulated structures each reflection
class may be defined by the number m = Sum | m~i~ |, where the m~i~
are the integer coefficients that, in addition to h,k,l, index
the corresponding diffraction vector in the basis defined
for the reciprocal lattice.
Type: Word
Category:
refln