Word Finder - silicate

definition

Any salt of silica or of one of the silicic acids; any mineral composed of silicates

Cylinders, tanks and independent boilers should be encased in a non-conducting material such as silicate cotton, thick felt or asbestos composition.

Hartley has employed it with great success, and in cyanite (a silicate of aluminium) has found a material which is infusible at the temperature of this flame, and is therefore suitable to hold the substance which it is desired to examine.

Aluminium silicate is the chemical body of which all clays are nominally composed.

Minerals, like glauconite, which contain ferrous silicate, may in like manner yield limonite, on weathering.

About 1740 Benjamin Huntsman introduced the " crucible process " of melting steel in small crucibles, and thus freeing it from the slag, or rich iron silicate, with which it, like wrought iron, was mechanically mixed, whether it was made in the old forge or in the puddling furnace.

The duty of the limestone (CaCO 3) is to furnish enough lime to form with the gangue of the ore and the ash of the fuel a lime silicate or slag of such a composition (1) that it will melt at the temperature which it reaches at about level A, of fig.

It has been suggested that ultramarine is a compound of a sodium aluminium silicate and sodium sulphide.

In France this slaking is conducted systematically by the makers, the freshly burned lime being sprinkled with water and stored in large bins where slaking proceeds slowly and regularly until the whole of the surplus uncom bined lime is slaked and rendered harmless, while the cementitious compounds, notably tricalcium silicate, remain untouched.

The principal ores of copper are the oxides cuprite and melaconite, the carbonates malachite and chessylite, the basic chloride atacamite, the silicate chrysocolla, the sulphides chalcocite, chalcopyrite, erubescite and tetrahedrite.

A further means of enabling a soap to contain large proportions of water and yet present a firm consistence is found in the use of silicate of soda.

Artificially formed crystals of the various species of mica have been observed in furnace-slags and in silicate fusions.

The alum schists employed in the manufacture of alum are mixtures of iron pyrites, aluminium silicate and various bituminous substances, and are found in upper Bavaria, Bohemia, Belgium and Scotland.

The fire may well have caused the natron, an impure form of carbonate of soda, to combine with the surrounding sand to form silicate of soda, which, although not a permanent glass, is sufficiently glass-like to suggest the x11.4 FIG.

For one kind of meat we could substitute another; wool could be replaced by cotton, silk or fur; were our common silicate glass gone, we could probably perfect and cheapen some other of the transparent solids; but even if the earth could be made to yield any substitute for the forty or fifty million tons of iron which we use each year for rails, wire, machinery, and structural purposes of many kinds, we could not replace either the steel of our cutting tools or the iron of our magnets, the basis of all commercial electricity.

On fusion with alkaline carbonates and hydroxides it undergoes oxidation to silica which dissolves on the excess of alkali yielding an alkaline silicate.

Calcium metasilicate, CaSiO 3, occurs in nature as monoclinic crystals known as tabular spar or wollastonite; it may be prepared artificially from solutions of calcium chloride and sodium silicate.

Kaolin thus seems to be the best ore, and it would undoubtedly be used were it not for the fatal objection that no satisfactory process has yet been discovered for preparing pure alumina from any mineral silicate.

Of these the first escapes immediately as a gas, and the others unite with iron oxide, lime, or other strong base present to form a molten silicate or silica-phosphate called " cinder " or " slag," which floats on the molten or pasty metal.

As the iron oxide is stirred into the molten metal laboriously by the workman or "puddler " with his hook or "rabble," it oxidizes the silicon to silica and the phosphorus to phosphoric acid, and unites with both these products, forming with them a basic iron silicate rich in phosphorus, called " puddling " or " tap cinder."

A rare blue chalcedony is sometimes polished under the name of "sapphirine" - a term applied also to a distinct mineral (an aluminium-magnesium silicate) from Greenland.

The mixture of the lime and active silica or silicate is a pozzuolanic cement.

This potential energy becomes kinetic when the slag is brought into contact with lime in the presence of water, and causes the formation of a true hydraulic silicate of lime.

As the outcome of these inquiries it has been established that tricalcium silicate 3CaO S10 2 is the essential constituent of Portland cement.

The two principal minerals are termed alite and celite; according to the best opinion, alite consists of a solid solution of tricalcium aluminate in tricalcium silicate, and celite of a solid solution of dicalcium aluminate in dicalcium silicate.

Hydrated monoCalcium calcium silicate.

Since alite is a solid solution and, although an individual mineral, is not a chemical unit, the proportion of tricalcium silicate to tricalcium aluminate in a given specimen of alite will vary; but, whatever the proportions, each of these substances will react in its characteristic manner according to the equations given above.

It is generally admitted that the aluminate is the chief agent in the first setting of the cement, and that its ultimate hardening and attainment of strength are due to the tricalcium silicate.

As mentioned above, the constituents other than the tricalcium silicate and tricalcium aluminate of which alite is composed, are of minor importance.

This means that portion which neutralizes the acid employed for testing, and the degrees mean the percentage of Na 2 O thus found, whether it be present as Na 2 CO 3, NaOH, or sodium aluminate or silicate.

In recent years it has been found in considerable quantities in New Caledonia in the form of a hydrated silicate of nickel and magnesia approximating to the constitution (NiO, MgO) SiO 2 .

In Canada air spaces are largely used either alone or in combination with silicate cotton or planer shavings.

The air spaces, two or three in number, are formed between two layers of tongued and grooved wood, and the total thickness of the insulation is about the same as when silicate cotton alone is used.

On board ship charcoal has been almost entirely employed, but silicate cotton and granulated cork are sometimes used.

It is certain, however, that the finer-grained rocks are richest in alumina, and in combined water; hence the inference is clear that kaolin or some other hydrous aluminium silicate is the dominating constituent.

In some processes of lead-smelting, where the minerals treated contain sand, the long calciner is provided with a melting bottom close to the fire-place, so that the desulphurized ore leaves the furnace as a glassy slag or silicate, which is subsequently reduced to the metallic state by fusion with fluxes in blast furnaces.

It is very refractory, and is applied by mixing with water and some bond, such as sodium silicate or gas-tar.

It is a silicate of iron. feldspar feldspath felspar a common rock-forming mineral. fermium a radioactive element, no.

The brilliant color of demantoid garnet is due to partial replacement of the silicate by chromic oxide.

Beeck's Silicate Masonry Paint is an exterior purely inorganic paint, free of artificial resins, solvents and biocides.

Kaolin is the common name for the mineral products comprised totally or substantially of the aluminum silicate clay mineral kaolinite.

Asbestos is a naturally occurring, fibrous silicate mineral.

These include silicate mixed with albumen, gelatine or stale beer.

Wanlockhead, richer in zinc ores, has a greater prevalence of secondary zinc species such as hemimorphite (hydrous zinc silicate ).

The bottles are filled with molecular sieve material grade 542 crystalline aluminum silicate.

Examples of such materials can be anything from NaCl (table salt) to clay (a complex silicate ).

You might like to try growing sugar crystals, copper sulfate crystals, sodium silicate crystals, potassium permanganate crystals or iodine crystals.

Pig iron is refined in a converter and then poured into molten iron silicate slag.

Finally, then, both experiment and the natural occurrence in rocks and meteorites suggest that diamond may crystallize not only from iron but also from a basic silicate magma, possibly from various rocks consisting of basic silicates.

Blocks and logs of agate, chalcedony, jasper, opal and other silicate deposits lie in hundreds over an area of 60 sq.

The sandstones commonly contain grains of felspar - a complex silicate of alumina and an alkaline base.