# Preferential alignment

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The '''preferential alignment''' is a criterion of an orientation of a molecule or atom. The preferential alignment can be related to the formation of the [crystal structure](/source/crystal_structure) of an [amorphous](/source/Amorphous_solid) structure.{{cn|date=November 2024}}

[Polymeric](/source/Polymer) masses with high atomic distances can either be in an oriented or non oriented state. These higher distances (up to 1000 Å) form great regions, where the molecular chains may be preferentially oriented, something which can happen independent to the existence or not of [crystallinity](/source/crystallinity).<ref>{{cite book|last=Canevarolo Júnior|first=Sebastião|year=2006|title=Ciência dos Polímeros|publisher=Artliber|language=pt|url=https://www.ifba.edu.br/professores/iarasantos/QUI%20541_Qu%C3%ADmica%20de%20pol%C3%ADmeros/LIvros/Cie%CC%82ncia%20dos%20polimeros%20-%20Canevarolo%20Jr.,%20Sebastia%CC%83o%20V..pdf}}</ref>

==References==
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Category:Crystallography

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