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  2. Fuller's earth - Wikipedia

    en.wikipedia.org/wiki/Fuller's_earth

    In some localities fuller's earth refers to calcium bentonite, which is altered volcanic ash composed mostly of montmorillonite. [2] [7] In 2005, the United States was the largest producer of fuller's earth with an almost 70% world share followed at a distance by Japan and Mexico.

  3. Bentonite - Wikipedia

    en.wikipedia.org/wiki/Bentonite

    Bentonite layers from an ancient deposit of weathered volcanic ash tuff in Wyoming Gray shale and bentonites (Benton Shale; Colorado Springs, Colorado). Bentonite (/ ˈ b ɛ n t ə n aɪ t / BEN-tə-nyte) [1] [2] is an absorbent swelling clay consisting mostly of montmorillonite (a type of smectite) which can either be Na-montmorillonite or Ca-montmorillonite.

  4. List of countries by bentonite production - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    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, have been used for clay beds of uncertain origin. For industrial purposes, two main classes of bentonite exist: sodium bentonite and calcium bentonite.

  5. Drilling fluid - Wikipedia

    en.wikipedia.org/wiki/Drilling_fluid

    The clay is usually a combination of native clays that are suspended in the fluid while drilling, or specific types of clay processed and sold as additives for the WBM system. The most common type is bentonite, called "gel" in the oilfield. The name likely refers to the fluid viscosity as very thin and free-flowing (like chocolate milk) while ...

  6. Smectite - Wikipedia

    en.wikipedia.org/wiki/Smectite

    In clay mineralogy, smectite is synonym of montmorillonite (also the name of a pure clay mineral phase) to indicate a class of swelling clays. The term smectite is commonly used in Europe and in the UK while the term montmorillonite is preferred in North America, but both terms are equivalent and can be used interchangeably.

  7. Medicinal clay - Wikipedia

    en.wikipedia.org/wiki/Medicinal_clay

    Bentonite-type clay has been used to treat infections, indigestion, and other medical problems by both applying wet clay topically to the skin as a poultice, and by ingesting it. Bentonite has been prescribed as a bulk laxative, and it is also used as a base for many dermatologic formulas. [30]

  8. Phoslock - Wikipedia

    en.wikipedia.org/wiki/Phoslock

    Phoslock is the commercial name for a bentonite clay in which the sodium and/or calcium ions are exchanged for lanthanum. The lanthanum contained within Phoslock reacts with phosphate to form an inert mineral known as rhabdophane ( LaPO 4 ⋅ n H 2 O {\displaystyle {\ce {LaPO4.{\mathit {n}}H2O}}} ).

  9. Clay mineral - Wikipedia

    en.wikipedia.org/wiki/Clay_mineral

    Clay minerals are hydrous aluminium phyllosilicates (e.g. kaolin, Al 2 Si 2 O 5 4), sometimes with variable amounts of iron, magnesium, alkali metals, alkaline earths, and other cations found on or near some planetary surfaces. Clay minerals form in the presence of water [1] and have been important to life, and many theories of abiogenesis ...

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