Fmstrated Stmcture

There is a wide range of other chiral mesophases that are somewhat unconventional in terms of their structure and many of these are rather recent developments. Blue phases are cubic mesophases that have a double twist stracture. They are exhibited by highly chiral materials and appear at temperatures above the chiral nematic phase. These phases give characteristic platelet type textures that are often blue (hence the name) but they can also appear green, yellow and red. The twist grain boundary (TGBA ) phase also has a fmstrated complex helical stmcture. In this case the normal lamellar stmcture is... 

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