Title: paracrystalline disorder of the first kind
Long Title: IUPAC Gold Book - paracrystalline disorder of the first kind
DOI: 10.1351/goldbook.14230
Status: current

Definition
Structural disorder in a paracrystal, resulting from uncorrelated displacements of the atoms around their average positions.

Note
Displacements are generally due to thermal vibrations.

Related Term
- paracrystal: https://goldbook.iupac.org//terms/view/14229

Source
- PAC, 2011, 83, 1831. 'Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)' on page 1848 (https://doi.org/10.1351/PAC-REC-10-11-13)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/14230/html
- json: https://goldbook.iupac.org/terms/view/14230/json
- xml: https://goldbook.iupac.org/terms/view/14230/xml

Citation: Citation: 'paracrystalline disorder of the first kind' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.14230
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Accessed: 2026-07-29T02:15:19+00:00