Barium
['beərɪəm] or ['bɛrɪəm]
Definition
(noun.) a soft silvery metallic element of the alkali earth group; found in barite.
Checked by Estes--From WordNet
Definition
(n.) One of the elements, belonging to the alkaline earth group; a metal having a silver-white color, and melting at a very high temperature. It is difficult to obtain the pure metal, from the facility with which it becomes oxidized in the air. Atomic weight, 137. Symbol, Ba. Its oxide called baryta.
Edited by Leah
Definition
n. the metal present in heavy spar (sulphate of baryta) and baryta formerly thought to be white but now known to possess a yellow colour.—adj. Bar′ic.
Typist: Waldo
Examples
- Radium, also discovered in thi s analysis of 1898, was associated with barium. Walter Libby. An Introduction to the History of Science.
- Among the high explosives of more recent date may be mentioned: _Tonite_ (gun cotton and barium nitrate), British patents No. 3,612, of 1874, and No. 2,742, of 1876. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
- An improvement consists in adding one ounce of carbonate of barium to the fluid while warm. William K. David. Secrets of Wise Men, Chemists and Great Physicians.
- Many other chemicals can be used, however, for making the fluorescing screen, such as the sulphides of calcium, barium and strontium. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
- It was quite a simple affair, and consisted of an observation tube with a lens, having in front of it a screen of fluorescing material, such as platino-cyanide of barium. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
- In some instances a chemical known as barium chloride is used, but the wisdom of this process has been much questioned, owing to the fact that barium chloride is a deadly poison. Various. The Wonder Book of Knowledge.
Checked by Jocelyn