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Home > Terms > English, UK (UE) > Ammonium fixation
Ammonium fixation
The process of entrapment of ammonium ions in interlayer spaces of phyllosilicates, in sites similar to K+ in micas. Smectites, illites and vermiculites all can fix ammonium, but vermiculite has the greatest capacity. The fixation may occur spontaneously in aqueous suspensions, or as a result of heating to remove interlayer water. Ammonium ions in collapsed interlayer spaces are exchangeable only after expansion of the interlayer.
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- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Earth science
- Category: Soil science
- Company: Soil Science Society of America
- Product:
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