orientational disorder

https://doi.org/10.1351/goldbook.14228
Structural disorder at given crystallographic positions, resulting from the statistical coexistence within crystals of directional stems with opposite orientations.
Note: A typical example is provided by the statistical coexistence of chains with opposite orientations at each crystallographic position in the crystal structures of poly-α-olefins, for example, in the \(\ce{\upalpha\mbox{-}form}\) of polypropylene.
Source:
PAC, 2011, 83, 1831. (Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)) on page 1848 [Terms] [Paper]
Citation: 'orientational disorder' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.14228 RIS BibTex EndNote
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