It is a niobate of uranium, iron, and the yttrium and cerium metals.
A mineral occurring usually in small isolated crystals, -- phosphate of the cerium metals.
Belonging to the same isomorphous group with epidote are the species piedmontite and allanite, which may be described as manganese and cerium epidotes respectively.
Cerous sulphide, Ce2S3, results on heating cerium with sulphur or cerium oxide in carbon bisulphide vapour.
Cerium dioxide, CeO2, is produced when cerium carbonate, nitrate, sulphate or oxalate is heated in air.
Nitrates of cerium have been described, as have also phosphates, carbonates and a carbide.
For the preparation of pure ceriumcompounds see Auer v.
Cerium compounds may be recognized by the red precipitate of ceric hydroxide, which is formed when sodium hypochlorite is added to a colourless cerous salt.
The particular earth containing cerium was discovered by M.
When cerium nitrate is converted by heat into cerium oxide, the expansion which takes place is practically nil, the ceria obtained from a gramme of the nitrate occupying about the same space as the original nitrate.
The mantle thus impregnated with thorium andcerium is placed on the gas jet, but before the gas is turned on, a lighted match is held to the mantle in order to burn away the thin fabric.
He made a cylindrical mantle of thin fabric, and then soaked it in a solution of thorium and cerium until it became saturated with the chemical.
During recent years the principle of the tinder-box has been revived in a device in which sparks are produced by rubbing the mineral cerite (a hydrous silicate of cerium and allied metals) against steel.
Mantles are made by knitting cylinders of cotton or of other fiber and soaking these in a solution of the nitrates of cerium and thorium.
Compounds of cerium with volatile acids yield dioxide on ignition; and this, on solution in hydrochloric acid, yields cerous chloride and chlorine.
In the ordinary course cerium is thrown down along with alumina and the other earths by ammonia.
Cerium occurs as silicate (together with the oxides of lanthanum, didymium, iron and calcium) in the mineral cerite, which is its chief source.
Cerium is detected by giving with borax a bead which is yellow in the oxidising, and colourless in the reducing flame.
The separation of lanthanum and didymium in the solution from which the cerium has been precipitated is effected by precipitating them together as oxalates, igniting, and dissolving in dilute nitric acid.
On boiling, the cerium is precipitated as dioxide, which is filtered off, ignited, and weighed.
Traces ofcerium compounds boiled with dioxide of lead and nitric acid will give a yellow solution.
The characters of oxide of cerium given by Berzelius and Hisinger, agree with those given by Klaproth to ochroita, in all the essential circumstances.
We have the analysis of cerium by Hisinger and Berzelius, together with an account of the chemical characters of the two oxides of cerium.
Cerium gets its name from the Roman goddess of agriculture by way of the asteroid.
It annoyed Welsbach to see the cerium residues thrown away and accumulating around his mantle factory, so he set out to find some use for it.
The manufacturers give away a pound of cerium salts with every purchase of a hundred pounds of thorium salts.
Since the monazite contains more cerium than thorium and the mantles made from it contain more thorium than cerium, there is a superfluity of cerium.
The chief sources of the material for the Welsbach burners is monazite, a glittering yellow sand composed of phosphate of cerium with some 5 per cent.
This element, in the researches of an associate, Mr. Ludwig Haitinger, proved to be cerium in minute quantity.
The mantle is made by soaking a "stocking" in a solution of nitrates of thorium and cerium (approx.
Defn: A mineral occurring usually in small isolated crystals, -- phosphate of the cerium metals.
Defn: A fluoride of the cerium metals occurring in hexagonal crystals of a pale yellow color.
These mantles contain the oxides of cerium and thorium in the ratio of about 1% of the former to 99% of the latter.
Cerium metal, alloyed with iron and other metals, forms the spark-producing alloys used in various forms of gas lighters and for lighting cigars, cigarettes, etc.
Welsbach mantles consist of about 99 per cent thorium oxide and 1 per cent cerium oxide.
Iridium and Osmium discovered by Tenant, and Cerium by Berzelius.
There are a number of ill-defined rare earth metals with atomic weights lying between those of Cerium and Tantalum.
Both, when hot and cold, the bead is colorless, by which character oxide of cerium may be distinguished from oxide of iron.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "cerium" in a variety of sentences. We hope that you will now be able to make sentences using this word.
