Core dictionary (coreCIF) version 2.3.1

_reflns_class_R_I_factor

Definition:

   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 R~B~ or R~Bragg~.

           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.

Appears in list containing _reflns_class_code

Type: numb

Category: reflns_class