Index

Core dictionary version 3.0.14

_refine_ls.R_I_factor

Definition:

   
     Residual factor R(I) for significantly intense reflections (satisfying
     _reflns.threshold_expression) and included in the refinement. This is
     most often calculated in Rietveld refinements of powder data, where it
     is referred to as R~B~ or R~Bragg~.
 
                   sum | I(meas_gt) - I(calc) |
           R(I) =  -----------------------------
                          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

Category:
refine_ls