Monoclinic unit cells Subject

Although the crystal structure of PVA has extensively been studied by many research groups, the detailed structure has not been confirmed. In these investigations there is no conflict for a two-chain monoclinic unit cell with a = 0.783 nm, b 0.252 nm (fiber axis), c = 0.551 nm and )3 % 92° [35, 36]. However, the relative positions of the molecular chains in the 6-projection and the hydrogen bonding are still controversial subjects. 

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