Data Item _refine_ls_class.R_I_factor
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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 current 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 |