I quote from these pages: "Bijvoet pairs are Bragg reflections which are true symmetry equivalents to a Friedel pair. These true symmetry equivalents have *equal amplitudes, even in the presence of anomalous scattering*."
Sounds more like centric or perhaps simply symmetry related to me. A few lines below: " A Bijvoet difference refers to the difference in measured amplitude for a Bijvoet pair" I don't think you can have it both ways ?? BR
