Index

Core dictionary version 3.3.0

_reflns.Friedel_fraction_max

Definition:

   
    The ratio of the number of Friedel pairs measured to
    _diffrn_reflns.theta_max to 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 given as the 'not-applicable' value '.' .

Type: Real

Units: none

Category:
reflns