Diatomite


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Related to Diatomite: diatomaceous earth, perlite

diatomite

[dī′ad·ə‚mīt]
(geology)
Dense, chert-like, consolidated diatomaceous earth.

Diatomite

 

(diatomaceous earth, infusorial earth, kieselguhr, mountain meal), a sedimentary rock consisting primarily of the shells of diatoms. It is usually friable or weakly cemented and light gray or yellowish in color. Small spheres (globules) of opal of nonorganogenic structure and detrital and argillaceous minerals may be found in diatomite in different quantities. Chemically, diatomite consists of 96 percent hydrated silica (opal). It is highly porous, has a high adsorption capacity, conducts heat and sound poorly, is not easily fused, and is acid resistant. Diatomite is formed from diatomaceous silt that has accumulated in seas and lakes. In a stratigraphic cross section it may be found beginning with the Cretaceous system and is common in Cenozoic beds. Owing to the high solubility of the diatom skeletons it changes easily into tripoli and opoka.

There are deposits of diatomite in the Far East, on the Eastern slope of the Urals, and in the central Volga Region. Diatomite is used as an adsorbent and filter in the textile, petrochemical, and food industries and in the production of antibiotics, paper, various plastics, and dyes. It is also used as a raw material in the making of water glass and glaze, as a heat-and sound-insulating material in construction, as an admixture in certain types of cement, as a polishing agent (in paste form) for metals and marble, and as a pesticide.

REFERENCES

Shvetsov, M. S. Petrografiia osadochnykh porod, 3rd ed. Moscow, 1958.
Prirodnye sorbenty. Moscow, 1967.

G. A. KALEDA

diatomite, diatomaceous earth, kieselguhr

A white or light gray, chalky, natural siliceous material; obtained by mining deposits of fossil remains of small marine life; used as an extender in paints, as an aggregate in lightweight concrete, as a waterproofing material in portland cement, as a filter for water, and as an abrasive.
References in periodicals archive ?
Keywords: Agriculture Structures, diatomite, light-weight aggregate, light-weight concrete, pozzolan.
29) The main constituent of diatomite is amorphous silica, although it can contain impurities such as organic components and metallic oxides (MgO, [Al.
In recent years diatomite has come under criticism as its heavy dust emissions have proven to be damaging to the health of the user's operatives and because of the increased cost of disposal.
Catalytic activity of Jordanian zeolite and diatomite during MBOH conversion remained relatively constant, whereas a slight increase of conversion on time was observed for bentonite, red and white kaolinite.
4) is infilled with a thinly laminated diatomite deposit that preserves a remarkable range of fossil plants and animals.
Prior to OXY, Griffith led the surface facilities team for AERA's pioneering work in steaming tight formations of diatomite, opening up production of more than 11 billion barrels of original oil in place (BOOIP) in California.
Diatomite may occur down or up stratigraphically from lacustrine tuffs (Brathwaite, 2006) and has been reported in several parts of Colombia, although there is no report of its appearance in the study area.
He points to deposits of diatomite on the shores of Lough Neagh around the town of Toome.
Among construction and industrial minerals are marble, granite, limestone, clay, gypsum, gemstone, iron ore, coal, copper, silica, diatomite and others.
also rich in deposits of bauxite, copper, gold, iron, lead, silver, tin and a number of non metallic minerals, among them bentonite, diatomite,
They had noticed that this thin layer had a unique consistency that had been characterized by their team as a diatomite, which is a layer extremely rich in fossils of another algae called diatoms," he added.
Diatomite is a kind of silicate materials, it is a nonmetal deposit that it is produced from the remains of diatoms living in ocean or lakes by action in natural circumstances.