If the reaction is performed in the fluorspar tube, the resulting gaseous silicon tetrafluoride, SiF{4}, may be collected over mercury.
The best mode of obtaining the fluoride of platinum for this purpose is to heat a bundle of platinum wires to low redness in the fluorspar reaction tube in a rapid stream of fluorine.
When the experiment is performed in the fluorspar tube, the gaseous fluoride may be collected over mercury.
When the liquid contains water, or when hydrofluoric acid is a product of the reaction, cylinders of platinum or of fluorspar are employed.
The apparatus is first filled with the gas to be experimented upon, then the fluorine is allowed to enter, and an observation of what occurs may be made through the fluorspar windows.
These fluorspar stoppers, which are covered with a coating of gum lac during the electrolysis, carry the electrode rods, t, which are thus perfectly insulated.
If it is required to heat the fluorspar tubes, they are surrounded by a closely wound copper spiral, which may be heated by a Bunsen flame.
These were probably quartz in this instance, althoughfluorspar is also included in this same genus.
For example, if we rub together some pulverised fluorspar in the dark, or raise its temperature by the direct application of heat, such as from a hot or warm iron, or a heated wire, we at once obtain excellent phosphorescence.
This gas is best prepared by heating in a capacious flask or retort equal parts of finely powdered fluorspar and white sand, or glass with ten or twelve times their weight of strong sulphuric acid.
By heating a mixture of fluorspar and ground flints with sulphuric acid a gaseous tetra-fluoride of silicon is formed, which, being partially soluble in water, yields an acid solution of the tetra-fluoride.
We use fluorspar mixed with bisulphate of potassa as a test for lithia and boracic acid in complicated compounds.
We have to mix one part of the silicate with two parts of a mixture composed of one part of fluorspar and one and a half parts of bisulphate of potassa.
Fluorspar is often mixed with boracic acid, which renders it unfit for analytical purposes.
Fluorspar (CaFl) produces a red as intense as pure lime, and fuses into a bead.
Scapolite | Occasionally contains a small quantity of lithia, and | colors the flame red when fused with fluorspar and | bisulphate of potassa.
This reaction is | especially distinct, if the mineral be previously mixed | with fluorspar and bisulphate of potassa.
The glass plate, with the waxed side downwards, placed on the leaden tray containing the fluorspar and sulphuric acid.
This acid is easily obtained and used by placing some powdered fluorspar in a leaden tray six inches square and two inches deep.
A mixture of fluorspar and sulphuric acid is then painted over the vessel and after a few minutes the vessel is washed clean.
Fluorspar has already been mentioned as the chief natural compound of fluorine.
The aluminium in the form of a fine powder is mixed with the metallic oxide, together with some substance such as fluorspar to act as a flux.
Powdered fluorspar D is placed around the sodium peroxide, after which the crucible is set on a pan of sand and the magnesium ribbon ignited.
Hydrofluoric acid is readily obtained from fluorspar by the action of concentrated sulphuric acid.
In order to be used in steel-making, the fluorspar after being concentrated should contain at least 85 per cent calcium fluoride and less than 4 per cent silica.
The domestic fluorspar is suitable for practically all purposes for which fluorspar is used except for lenses in optical instruments.
The production offluorspar in the United States is several times that of any other country.
For fluxing purposes domestic fluorspar is superior to the foreign product.
The United States has sufficient supplies of fluorspar to meet all its own demands for this material.
For this use very small quantities of material imported from Japan have been used, but recently fluorspar of a grade suitable for optical purposes has been found in Illinois, Kentucky, New Hampshire, and other states.
The chief foreign producer of fluorsparis Great Britain, and much of this product comes to the United States.
The large fluorspar deposits of Illinois and Kentucky contain fluorite with calcite, barite, and metallic sulphides, in wide veins filling fissures in limestones and sandstones and replacing the fissure walls.
The crystals occurred in association with topaz, fluorsparand cassiterite; but they were mostly of rather pale colour.
The centre of the fluorspardistrict was Rosiclare in Hardin county.
Sometimes a face is entirely replaced by small faces of other forms, giving rise to a drusy surface; an example of this is shown by some octahedral crystals of fluorspar (fig.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "fluorspar" in a variety of sentences. We hope that you will now be able to make sentences using this word.
