Tellurium occurs in nature, native, and in combination with gold, silver, bismuth and lead.
It may be detected by the purple colour it imparts to strong sulphuric acid when dissolved in the cold, and by the black precipitate of metallic tellurium which its solutions yield on treatment with a reducing agent.
The precipitate on the zinc is washed, dried, and heated to redness, treated with sulphuric acid to remove any silver, and the remaining tellurium is then collected.
The most distinctive character of telluriumcompounds is the reddish-purple solution of potassium telluride they furnish when fused with potassic carbonate and charcoal and treated with water.
Tellurium dissolves in cold concentrated sulphuric acid, to which it imparts a rich purple-red colour.
If the acid solution be diluted with water the telluriumprecipitates unchanged.
Tellurium bears a great resemblance to bismuth in appearance, having a pinkish metallic lustre; it further resembles bismuth in being crystalline and brittle.
When taken internally, even in very minute quantities, tellurium imparts to the breath an offensively powerful odour of garlic.
Tellurium may be obtained from the bismuth ore (the telluride of bismuth) by strongly heating the ore with a mixture of carbonate of potash and charcoal.
A potassium telluride is formed which dissolves in water, forming a solution of a purplish-red colour, from which the tellurium deposits on exposure of the liquid to the atmosphere.
By a high temperature, and with little access of air, metallic tellurium sublimes with the deposition of a grey powder.
If tellurium is heated with free access of air, it takes fire, and burns with a blue color, the flame being greenish at the edges, while a thick white vapor escapes, which has a feeble acidulous odor.
In the reducing flame yields a bead of metallic bismuth, part of which is part of the tellurium volatilized and incrusts the charcoal around.
If the sublimate found upon the charcoal in the first experiment be submitted to the blowpipe flame, the green color of tellurium is produced while the sublimate is volatilized.
At a temperature which is about to fuse the glass, tellurium yields a small quantity of a white vapor (some tellurium is oxidized to tellurous acid by the oxygen of the air in the tube).
If the flame of reduction is directed upon a small piece of the oxide of tellurium placed upon charcoal, a bright green color is produced.
If the flame of reduction is directed upon the oxide of tellurium placed upon charcoal, a green color is imparted to it.
The metals tellurium and cadmium are susceptible of solution, but the heat required is a high one.
The oxide of tellurium and telluric acid gives a clear bead when it is hot, but white after it is cooled.
The oxides of tellurium and antimony will sublime, the latter in minute glittering needles.
By exposing them to the flame of reduction, the sublimate of tellurium disappears and communicates an intense green color to the flame.
Also gives the tellurium reaction with charcoal and carbonate of soda.
After a continued blast, tellurium is completely volatilized, and the bead appears clear again, while a white sublimate is deposited upon the charcoal.
That of antimony is white, while those of bismuth and tellurium are dark yellow.
Tellurium produces, under the same circumstances, an intense vapor, and deposits on the glass a white powder, which melts by heat into globules that run over the glass.
Defn: A compound of tellurium with a more positive element or radical; -- formerly called telluret.
It also occurs associated with other metallic substances, as in auriferous pyrites, and is combined with tellurium in the minerals petzite, calaverite, sylvanite, etc.
With this positive current the tellurium pins make marks upon the paper tape, but the iron pins make no mark.
In this case the iron pins mark the paper tape, but the tellurium pins make no mark.
The deposit of telluriumis of a bluish black color.
If the current is feeble, the deposit of selenium is moderately compact; that of tellurium is always loose, and it often floats on the liquid.
Thus, having studied the element sulphur in some detail, it is not necessary to study selenium and tellurium so closely, for most of their properties can be predicted from the relation which they sustain to sulphur.
Tellurium is sometimes found in combination with gold and copper, and occasions some difficulties in the refining of these metals.
According to their atomic weights, tellurium should follow iodine, and argon should follow potassium.
One of those pockets of tellurium that's never been known to run less than twenty thousand to the ton.
The smelter has undoubtedly been notified of the robbery by this time, and the character of the Pelican tellurium is so well known that any one offering any of it for sale would have to give a very clear story as to how he came by it.
The cross in tellurium is identical with that in cadmium, except that the centre is seven-atomed instead of four-atomed.
Tellurium very closely resembles cadmium, and they are, therefore placed on the same diagram.
The same characteristics of four funnels opening on the faces of a tetrahedron are found in all, but magnesium and sulphur have no central globe, and in cadmium and tellurium the globe has become a cross.
If tellurium be present, carmine and purple colors on the assay will proclaim the fact.
Sometimes it is desirable to determine whether tellurium is present in an ore.
The bismuth to which thetellurium was added had become minutely crystalline; while that which remained pure had crystallized in broad mirror-like planes.
In Professor Roberts-Austen’s laboratory, in London, two ladles were filled with exceptionally pure bismuth; into one ladle a tiny fragment of tellurium was placed.
You'll take the sorrels, Curly, and drive to Telluriumfor the doctor.
Doctor Wilson, arriving fromTellurium on the third day after the encounter at Paradise, found Huntington in a bad way, due not so much to the wound in his left shoulder as to the state of his mind.
Tellurium was her mule, to give to whom she chose, but he was matched to pull with Bodie when they needed a team and her father might not approve.
She might see his tall form, and the white sides of Tellurium as he took the shortest way home, and then she could run back and drag her mother to the portal and prove that her knight had been misjudged.
Billy sat on Tellurium and gazed with rapt wonder at the scene which stretched out below.
Up and up it led, until Tellurium was exhausted and Wilhelmina had to get off and walk; and at last, when it was almost at the summit of the range, it entered a great stone patch and was lost.
So she followed along behind them, leading Tellurium by his rope, and entered her city of dreams unnoticed.
And then he went up and told Mother all about it and said that Mr. Calhoun would do anything, and he said he'd probably take Tellurium to Wild Rose and trade him off to some squaw!
He was some searcher who had found her tracks in the sand, and the tracks of Tellurium going on; and, rather than follow the long trail to Wild Rose Springs, he was coming to interview her.
Billy stood it until noon, then she caught up Tellurium and rode off after the dog.
We obtain the desired concentration of invisible light by using a tellurium current-filter under the influence of alternate flashes of red and blue light.
All this flashed through the Agent's mind in the fraction of a second that it took him to extend Philip's hand, close the switch of the dynamo, and snap on the alternating lights in the housing over the tellurium filter.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tellurium" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: alabaster; asphalt; mineral; silver
