Bentonite

Bentonite is an absorbent aluminium phyllosilicate, essentially impure clay consisting mostly of montmorillonite. There are different types of bentonite, each named after the respective dominant element, such as potassium (K), sodium (Na), calcium (Ca), and aluminium (Al). Experts debate a number of nomenclatorial problems with the classification of bentonite clays. Bentonite usually forms from weathering of volcanic ash, most often in the presence of water. However, the term bentonite, as well as a similar clay called tonstein, has been used to describe clay beds of uncertain origin. For industrial purposes, two main classes of bentonite exist: sodium and calcium bentonite. In stratigraphy and tephrochronology, completely devitrified (weathered volcanic glass) ash-fall beds are commonly referred to as K-bentonites when the dominant clay species is illite. Other common clay species, and sometimes dominant, are montmorillonite and kaolinite. Kaolinite-dominated clays are commonly referred to as tonsteins and are typically associated with coal.

Read more about Bentonite:  Uses, History and Natural Occurrence

Other articles related to "bentonite, bentonites":

Lost Circulation - Additives
... additive used to control or cease lost circulation is bentonite, in that it inherently will seal small holes or fractures ... Bentonite, in higher concentrations, increases viscosity, and therefore slows the fluid flow into the surrounding rock ... Although bentonite is the most common additive used, it sometimes is not used at all, depending on the current fluid being used and the current depth of drilling in relation to desired ...
Bentonite - History and Natural Occurrence
... Further information List of countries by bentonite production In 2005, U.S ... was the top producer of bentonite with almost one-third world share followed by China and Greece, reports the British Geological Survey ... The absorbent clay was given the name bentonite by Wilbur C ...
Geosynthetic Clay Liners - Other Names
... Other names used for GCLs since their initiation are “clay blankets”, “bentonite blankets”, “bentonite mats”, “prefabricated bentonite clay blankets” and “clay geosynthetic barriers”, the ...
List Of Countries By Bentonite Production
... Bentonite is an absorbent aluminium phyllosilicate generally impure clay consisting mostly of montmorillonite ... There are a few types of bentonites and their names depend on the dominant elements, such as potassium, sodium, calcium, and aluminium ... some nomenclatorial problems with the classification of bentonite clays ...
Catbox - Types of Litter Box Filler - Clumping Litter
... The type of clumping litter developed by the FEU was calcium bentonite, a less swelling and less sticky type than American bentonite ... Subsequently in America, clumping bentonite was developed in 1984 by biochemist Thomas Nelson ... Most are made from granulated bentonite clay which clumps together when wet and forms a solid mass separate from the other litter in the box ...