Montmorillonite is a very soft phyllosilicate group of minerals that typically form in microscopic crystals, forming a clay. It is named after Montmorillon in France. Montmorillonite, a member of the smectite group, is a 2:1 clay, meaning that it has 2 tetrahedral sheets sandwiching a central octahedral sheet. The particles are plate-shaped with a...
any of a group of clay minerals and their chemical varieties that swell in water and possess high cation-exchange capacities. The theoretical ... [2 related articles]
A soft clay-like mineral, composed of hydrous aluminum silicate, that can function as a catalyst in the formation of RNA oligomers.
a clay mineral often used as an additive to drilling mud. It is a hydrous aluminum silicate capable of reacting with such substances of magnesium and calcium. See bentonite. 
A type of clay that has a large capacity to shrink and expand with wetting and drying.
Montmorillonite is a mineral discovered at Montmorillon in France, and confirmed as a distinct species in 1847. Montmorillonite is a form of clay found in many sedimentary rocks especially bentonite and in some metamorphic rocks. It is formed mainly through the alteration of pre-existent feldspar in rocks that are poor in silica. Montmorillonite is...
A very plastic clay, more siliceous than kaolinite; the principal constituent of bentonite.
any of a group of clay minerals characterized by the ability to expand when they absorb large quantities of water. Also called