Data Item _refine_ls_class.R_I_factor

General

Item name
_refine_ls_class.R_I_factor
Category name
refine_ls_class
Attribute name
R_I_factor
Required in PDB entries
no
Used in currrent PDB entries
No

Item Description

For each reflection class, the residual factor R(I) for the reflections judged significantly intense (i.e. satisfying the threshold specified by _reflns.threshold_expression) and included in the refinement. This is most often calculated in Rietveld refinements against powder data, where it is referred to as RB or RBragg sum | I(obs) - I(calc) | R(I) = ------------------------ sum | I(obs) | I(obs) = the net observed intensities I(calc) = the net calculated intensities and the sum is taken over the reflections of this class.

Data Type

Data type code
float
Data type detail
float item types are the subset of numbers that are the floating numbers.
Primitive data type code
numb
Regular expression
-?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?

Allowed Boundary Conditions

Minimum Value Maximum Value
0.0

+∞

Aliases

Alias Item Name Dictionary Name Dictionary Version
_refine_ls_class_R_I_factor cif_core.dic 2.3