Term: mechanical entrapment
https://doi.org/10.1351/goldbook.M03800

Definition:
The process of random incorporation of comparatively small quantities of other phases (e.g. water, dust, particles, etc.) in the bulk of a precipitate during its formation.

Source: 

Citation: 'mechanical entrapment' 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.M03800

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