Oxford Clay (Jurassic) exposed near Weymouth, England
Clay minerals are hydrous aluminium phyllosilicates (e.g. kaolin, Al2Si2O5(OH)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 involve them. They are important constituents of soils, and have been useful to humans since ancient times in agriculture and manufacturing.
^Kerr PF (1952). "Formation and Occurrence of Clay Minerals". Clays and Clay Minerals. 1 (1): 19–32. Bibcode:1952CCM.....1...19K. doi:10.1346/CCMN.1952.0010104.
Clayminerals are hydrous aluminium phyllosilicates (e.g. kaolin, Al2Si2O5(OH)4), sometimes with variable amounts of iron, magnesium, alkali metals, alkaline...
Clay is a type of fine-grained natural soil material containing clayminerals (hydrous aluminium phyllosilicates, e.g. kaolinite, Al2Si2O5(OH)4). Most...
-lih-; also called kaolin) is a claymineral, with the chemical composition Al2Si2O5(OH)4. It is a layered silicate mineral, with one tetrahedral sheet of...
glass (obsidian, rhyolite, dacite) present in the ash into clayminerals. In the mineral alteration process, a large fraction (up to 40–50 wt.%) of amorphous...
by particles of clay and organic matter (colloids) The nutrients may be adsorbed on claymineral surfaces, bound within clayminerals (absorbed), or bound...
Polymer clay is a type of hardenable modeling clay based on the polymer polyvinyl chloride (PVC). It typically contains no clayminerals, but like mineral clay...
pseudohexagonal structure Chlorite is considered a claymineral. It is a nonswelling claymineral, since water is not adsorbed in the interlayer spaces...
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific...
chemical structures, properties and reactions of or involving clays and clayminerals. It is a multidisciplinary field, involving concepts and knowledge from...
flakes of clayminerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2Si2O5(OH)4) and tiny fragments (silt-sized particles) of other minerals, especially...
type of clay soil common to the Southeastern United States. It is one of the types of fuller's earth. Some smaller deposits of this mineral can be found...
production processes vary considerably. Ceramic clays are water-based substances made from clayminerals and other raw materials. They are baked at high...
This is a list of minerals which have Wikipedia articles. Minerals are distinguished by various chemical and physical properties. Differences in chemical...
Mineral hydration is also a process in the regolith that results in conversion of silicate minerals into clayminerals.[citation needed] Some mineral...
micas and ferromagnesian minerals such as pyroxenes, amphiboles and olivines, which are dissolved or transformed in clay under the combined influence...
or more of the following: Fe, Al, and/or Mn species; clayminerals; organic matter. B: Mineral horizon that has (at least originally) formed below an...
-shəm; German: [ˈmeːɐ̯ʃaʊm] ; meaning "sea foam"), is a soft white claymineral, often used to make tobacco pipes (known as meerschaum pipes). A complex...
only part of a mineral is taken into solution. The rest of the mineral is transformed into a new solid material, such as a claymineral. For example, forsterite...
of expansive minerals can form deep cracks in drier seasons or years; such soils are called vertisols. Soils with smectite clayminerals, including montmorillonite...
diatomaceous earth is 80–90% silica, with 2–4% alumina (attributed mostly to clayminerals), and 0.5–2% iron oxide. Diatomaceous earth consists of the fossilized...
chemicals become positively charged in the acidic stomach, they bind to clayminerals which have negatively charged cation-exchange sites, and are thereby...
phyllosilicate group of minerals that form when they precipitate from water solution as microscopic crystals, known as clay. It is named after Montmorillon...
United States Environmental Protection Agency defines fire clay very generally as a "mineral aggregate composed of hydrous silicates of aluminium (Al2O3·2SiO2·2H2O)...
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