Liquid crystalline order seen in objects of daily life.
calamitic molecule

nematic (1) (2) (3) (4) (5)

smectic A (1) (2) (3) (4)
smectic Ad
smectic B
smectic C
smectic doped

surface films

phase transition
clearing point

isotropic (1) (2) (3)

banana molecule
twin molecule
banana LC phase

discotic molecule
discoid nematic (1) (2)
hexagonal discotic (1) (2)
tetragonal discotic

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Smectic Ad phases have a layer structure with perpendicular molecules. Two layers are interdegitated into each other:

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