“…Although the vitrification of crystal-like smectic phases, in which molecules are arranged within the layers (smectic B, E, F, G, H, etc. ), − is not evident, a few examples of the glasses of smectic phases have been reported: the glass of smectic B in 4- n -butyloxybenzylidene-4′- n ′-octylaniline (BBOA), the glass of smectic H, the glass of smectic E, , and the glass of smectic G. , Contrary to “conventional” glasses considered as amorphous materials, the glassy state of the crystal-like phase is characterized by orientational disorder of the molecules, which otherwise possess translational order. In previous work, we showed that in the vitreous state of the SmE phase, the smectic layers are preserved, but the translational order of molecules within the layers is slightly disturbed. , We found an analogy between the glass of a smectic E phase and the glassy state in plastic crystalline phases .…”