The first observation of a smectic-A phase with two collinear incommensurate density modulations is reported. X-ray diffraction studies of this incommensurate phase reveal reflections corresponding to both partially bilayer (Ad) and bilayer (A₂) periodicities, the relative intensities of the two reflections being strongly temperature dependent.
No takes yet. Share an insight, caveat, or question.
Ratna et al. (1985) studied this question.