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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.
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}}} ).
A cooking vessel is a type of cookware or bakeware designed for cooking, baking, roasting, boiling or steaming. Cooking vessels are manufactured using materials such as steel, cast iron, aluminum, clay and various other ceramics. [1] All cooking vessels, including ceramic ones, absorb and retain heat after cooking has finished. [2]
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.
Ayilo, also known as ayilor, hyile, [1] and ferinkasa, is a Ghanaian term for bentonite clay. [2] [3] It is a baked solid white clay usually taken by pregnant women. [4] [5] They are usually baked into egg-shaped balls. [6] Ewes call it agatawoe/agatawe, Gas called it ayilo, English call it kaolin and the Akans call it shirew/shile.
The English name reflects the historical use of the material for fulling (cleaning and shrinking) wool, by textile workers known as fullers. [1] [2] [3] In past centuries, fullers kneaded fuller's earth and water into woollen cloth to absorb lanolin, oils, and other greasy impurities as part of the cloth finishing process.
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Cords, textiles, baskets, and corncobs have been rolled over wet clay, both as a decoration and to improve heat dispersion in cooking pots. Carved wood or ceramic stamping paddles are used throughout the Southeastern Woodlands to create repeating designs. Clay can also be added to the main ceramic structure to build up designs.