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Macromolecular dictionary (mmCIF) version 2.0.09

_reflns_shell.Rmerge_F_gt

Name:
'_reflns_shell.Rmerge_F_gt'

Definition:

   The value of Rmerge(F) for significantly intense reflections
   (see _reflns.threshold_expression) in a given shell.

               sum~i~ ( sum~j~ | F~j~ - <F> | )
   Rmerge(F) = --------------------------------
                   sum~i~ ( sum~j~ <F> )

   F~j~  = the amplitude of the jth observation of reflection i
   <F> = the mean of the amplitudes of all observations of
          reflection i

   sum~i~ is taken over all reflections
   sum~j~ is taken over all observations of each reflection.

Type: float

Mandatory item: no

Alias:
_reflns_shell_Rmerge_F_gt (cif_core.dic version 2.3)
The permitted range is [0.0, infinity)

Related item: _reflns_shell.Rmerge_F_obs (alternate)

Category: reflns_shell