bentonite
Sign in to saveupright=1.3|thumb|Bentonite layers from an ancient deposit of weathering|weathered [[volcanic ash tuff in Wyoming]] thumb|Gray shale and bentonites (Benton Shale; Colorado Springs, Colorado)
Article
22 sectionsContents
- Types
- Sodium bentonite
- Calcium bentonite
- Illitisation of smectite clays by potassium ions and K-bentonite rock
- Applications
- Drilling mud
- Binder
- Purification
- Absorbent
- Carrier
- Filler
- Sealant
- Catalyst
- Medicine
- Farming in Thailand
- Bentonite slurry walls in modern construction
- Ceramics
- Emergency response
- History and natural occurrence
- See also
- References
- External links
upright=1.3|thumb|Bentonite layers from an ancient deposit of weathering|weathered [[volcanic ash tuff in Wyoming]] thumb|Gray shale and bentonites (Benton Shale; Colorado Springs, Colorado)
Bentonite ( ) is an absorbent swelling clay consisting mostly of montmorillonite (a type of smectite) which can either be Na-montmorillonite or Ca-montmorillonite. Na-montmorillonite has a considerably greater swelling capacity than Ca-montmorillonite.