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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
_reflns_class.R_I_factor
Name:_reflns_class.R_I_factor
Alias:
_reflns_class_R_I_factor
Definition:
Residual factor R(I) for reflections in this class judged
significantly intense (i.e. greater than required by the
_reflns.threshold_expression) and included in the refinement.
sum | I(meas_gt) - I(calc) |
R(I gt) = ----------------------------
sum | I(meas_gt) |
I(meas_gt) = the net 'observed' intensities
I(calc ) = the net calculated intensities
and the sum is taken over the specified reflections.
Type: Real
Units: none
The permitted range is 0.0 → infinity
Category:
reflns_class
