smectite clay

Poor drainage is necessary because otherwise water can leach away ions (e.g. SMECTITE GROUP. at +1.202.554.1404. Smectite refers to a family of non-metallic clays primarily composed of hydrated sodium calcium aluminum silicate.

The physicochemical properties of smectite clay minerals that determine their industrial utilization are reviewed. Smectite is the name used for a group of phyllosilicate mineral species, the most important of which are montmorillonite, beidellite, nontronite, saponite and hectorite. For further information on packaging options contact READE. Natural Na smectites occur in commercial quantities in only a few places, but Ca-M g smectite and Fuller’s earth deposits of considerable size occur on almost every continent.

Smectites commonly result from the weathering of basic rocks.

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Smectites are used in industry as fillers, carriers, absorbents, and a component in drilling fluids (Grim, 1962). You need JavaScript enabled to view it. For example, dioctahedral smectites have 060 reflections at 1.50-1.52 angstroms, whereas trioctahedral smectites have 060 reflections at 1.53-1.54 angstroms; and Li saturation can be used to differentiate some montmorillonites from beidellite (Schultz, 1969).

A significant fraction of the Ca-M g smectites used for decolorizing has been acid treated. The basic structural unit is a layer consisting of two inward-pointing tetrahedral sheets with a central alumina octahedral sheet. This email address is being protected from spambots. Smectite Clay Group CAS Numbers: Sodium Montmorillonite (Western Bentonite)= … Used to slow the progress of water through soil or rocks; Used in drilling muds to give the water greater viscosity; Used to produce nanocomposites: Used as an absorbent to purify and decolor liquids; Used as a filler in paper and rubber; and used as a base for cosmetics and medicines. Smectite clays have a variable net negative charge, which is balanced by Na, Ca, Mg and, or, H adsorbed externally on interlamellar surfaces. Smectites yield X-ray diffraction patterns characterized by basal reflections that vary with humidity, exposure to certain organic molecules, heat treatment, and exchangeable cations (Wilson, 1987). Chemical Name: Hydrated sodium calcium aluminum silicate, Chemical Formula: (Na, Ca)(Al,Mg)6(Si4010)3(OH)6-nH20, Jars, pails, drums, multiply paper bags, bulk bags and fiberboard containers. The term clay … The physicochemical properties of smectite clay minerals that determine their industrial utilization are reviewed.
For further information please call the E.P.A. For further information please call the E.P.A.

Individual smectites can sometimes be differentiated by their higher-order peaks or by cation saturation. Enter your email address below and we will send you the reset instructions. If the address matches an existing account you will receive an email with instructions to reset your password. Mathematical notations produced through Infty OCR. Clay mineral, any of a group of important hydrous aluminum silicates with a layer (sheetlike) structure and very small particle size. Smectite is the name used for a group of phyllosilicate mineral species, the most important …

When saturated with ethylene glycol, the 001 reflection of most smectites will swell to about 17 angstroms (about 17.8 angstroms with glycerol); when heated to 400 C, the 001 reflection will collapse to about 10 angstroms (the exact amount of collapse is often related to the exchange Large quantities of Ca-M g smectites are used directly in iron foundries, in agricultural industries and for filtering and decolorizing various types of oils. Large volumes of Fuller’s or acid earths are commercially used for preparing animal litter trays and oil and grease absorbents, as carriers for insecticides, and for decolorizing of oils and fats. Scanned images copyright © 2017, Royal Society, Smectite clay minerals: properties and uses, Philosophical Transactions of the Royal Society of London. Large volumes of Na smectites and Na-exchanged Ca-M g smectites and Fuller’s earth are directly used in the foundry, oil well drilling, wine, and iron ore and feed pelletizing industries, and are also used in civil engineering to impede water movement. They may contain significant amounts of iron, alkali metals, or alkaline earths.. General considerations. As such, it may contain errors. Diffraction.

Series A, Mathematical and Physical Sciences. The layers are continuous in the a and b directions, but the bonds between layers are weak and have excellent cleavage, allowing water and other molecules to enter between the layers causing expansion in the c direction (Grim, 1962).

Members of the smectite group include the dioctahedral minerals montmorillonite, beidellite, and nontronite, and the trioctahedral minerals hectorite (Li-rich), saponite (Mg-rich), and …

at +1.202.554.1404, Sodium Montmorillonite (Western Bentonite)= CAS# 1318-93-0, Sodium Montmorillonite (Wyoming Bentonite)= CAS# 1302-78-9, Magnesium Montmorillonite= CAS# 12199-37-0, Calcium Montmorillonite (Mississippi bentonite)= CAS# 1302-76-7. Smectite is the name used for a group of phyllosilicate mineral species, the most important …

Mg) freed in the alteration reactions. A Laboratory Manual for X-Ray Powder Common names for smectite include montmorillonite or sodium montmorillonite ("sodium bentonite" or "Wyoming bentonite") and swelling bentonite ("Western bentonite"). In terms of major industrial and chemical uses, natural smectite clays can be divided into three categories, Na smectites, Ca-Mg smectites and Fuller’s or acid earths.
cations present and to the smectite itself). The structure, chemical composition, exchangeable ion type and small crystal size of smectite clays are responsible for several unique properties, including a large chemically active surface area, a high cation exchange capacity, interlamellar surfaces having unusual hydration characteristics, and sometimes the ability to modify strongly the flow behaviour of liquids. Please contact the Royal Society if you find an error you would like to see corrected. Other factors that favor the formation of smectites include the availability of Ca and the paucity of K (Deer and others, 1975). The physicochemical properties of smectite clay minerals that determine their industrial utilization are reviewed.

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