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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
_diffrn_refln.class_code
Name:_diffrn_refln.class_code
Alias:
_diffrn_refln_class_code
Definition:
The code identifying the class to which this reflection has
been assigned according to some binning strategy. This code must match a
value of _diffrn_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 cell.
Type: Word
Category:
diffrn_refln