Bentonite, Fayette County, Texas
Bentonite is an absorbent aluminium phyllosilicate clay consisting mostly of montmorillonite.
Specimen Location: 2 miles west of Flatonia, Fayette County, Texas
Chemical Formula (Montmorillonite): (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Crystal System: Monoclinic
Vial Weight: 101 grams
UT Collection ID: TMM-193
Main uses of bentonite are for drilling mud, binder (e.g. foundry-sand bond, iron ore pelletizer), purifier, absorbent (e.g. pet litter), and as a groundwater barrier. About 50% of bentonite is used in drilling muds.
In the permanent collection of the Jackson School of Geosciences, University of Texas at Austin.