**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 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 specified reflections

The permitted range is 0.0 -> infinity

**Type:** numb

**Category:** refine

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