Core dictionary (coreCIF) version 2.4.5




   The number of Friedel pairs measured out to
   _diffrn_reflns_theta_max. divided by the
   number theoretically possible (ignoring reflections in
   centric projections and systematic absences
   throughout). In contrast to _reflns_Friedel_coverage
   this can take values in the full range 0 to 1 for any
   non-centrosymmetric space group, and so one can see at
   a glance how completely the Friedel pairs have been
   measured. For centrosymmetric space groups the value
   would be 0/0 and so would be given as '.'.

The permitted range is 0.0 -> 1.0

Type: numb

Category: reflns