|
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
_reflns.threshold_expression
Name:_reflns.threshold_expression
Aliases:
_reflns_threshold_expression
_reflns_observed_criterion
_reflns.observed_criterion
Definition:
Description of the criterion used to classify a reflection as having a
significant intensity. This criterion is usually expressed in terms
of a u(I) or u(F) threshold, where u is the standard uncertainty.
Example:| I>2u(I) |
Type: Text
Category:
reflns
