Growth spirals in dilute solution

It is universally agreed that chain folded lamellae only very rarely, if ever, trigger conventional secondary nucleation and growth of additional layers on the basal 

There is another component of the energy of an incipient spiral, that associated with the two lateral surfaces of height b = /o and width Tq. Should these surfaces be created in a perfect crystal, the additional energy would be Wsur = 2broCt = 10 x 10 J for 6 = 10 nm, To = 50 nm, and cr= 10 mJ/ml Hence, = 2000, 

In at least one situation, the genesis of giant screw dislocations can be attributed to internal stresses associated with nonplanar crystals. Reference was made in Section 3.1 to the chair form of polyethylene crystals 

Please note that spiral growth does not lead to multiple lamellae in a formal sense. The structure is better described as a single crystal that adopts the shape of a helicoidal ribbon of tapering width in which the turns 

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