Collett, J.Sorensen, L. B.Pershan, PeterLitster, J. D.Birgeneau, R. J.Als-Nielsen, J.2013-03-011982Collett, J., L. B. Sorensen, Peter S. Pershan, J. D. Litster, R. J. Birgeneau, and J. Als-Nielsen. 1982. Synchrotron x-ray study of novel crystalline-B phases in heptyloxybenzylidene-heptylaniline (7O.7). Physical Review Letters 49(8): 553–556.0031-9007http://nrs.harvard.edu/urn-3:HUL.InstRepos:10361608This paper reports an x-ray diffraction study of structures and restacking transitions within the B phases of heptyloxybenzylidene-heptylaniline. The system evolves from a hexagonal close-packed structure, through intermediate orthorhombic and monoclinic phases, to a simple hexagonal structure. The monoclinic phase has a temperature-dependent shear which transforms the system from orthorhombic to hexagonal. The latter three phases exhibit a single-q⃗ sinusoidal modulation of the molecular layers.en-USJournal Article2013-03-0110.1103/PhysRevLett.49.553