Bentonites | Clays and Minerals
Definition: Bentonite is defined as a naturally occurring material that is composed predominantly of the clay mineral smectite. Most bentonites are formed by the alteration of volcanic ash in marine environments and occur as layers sandwiched between other types of rocks.WWW-MINCRYST - CRYSTALLOGRAPHIC DATABASE FOR,WWW-MinCryst is Crystal Structure Data Base for Minerals containing about 7000 entries (3000 unique names, 4000 varieties on composition, structure and T-, P-conditions of synthesis). Information Card includes: Name, Specification, Crystal Chemical Formula, Space Group, Z, Unit Cell Parameters, Coordinates of Atomic Position, References, etc. Search on chemical composition and crystalBentonite company list in Russia(Russian Federation),Bentonite company list , 3 , in Russia(Russian Federation) , include moscow,Russia,Moscow region,Saint-Petersburg,Rostov Region,Krasnodar .