barium

Definitions

  • WordNet 3.6
    • n barium a soft silvery metallic element of the alkali earth group; found in barite
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Webster's Revised Unabridged Dictionary
    • n Barium (Chem) 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.☞ Some of the compounds of this element are remarkable for their high specific gravity, as the sulphate, called heavy spar, and the like. The oxide was called barote, by Guyton de Morveau, which name was changed by Lavoisier to baryta, whence the name of the metal.
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Century Dictionary and Cyclopedia
    • n barium Chemical symbol, Ba; atomic weight, 137.1. A chemical element belonging to the group of metals whose oxids are the alkaline earths. It is obtained as a silver-white powder, which oxidizes quickly and burns when heated in air. Its melting-point is about that of cast-iron. It does not occur native, but is found abundantly in combination in the minerals barite, barium sulphate, and witherite or barium carbonate, and less commonly in several other minerals. Barium combines with most acids to form salts which are more or less soluble in water, and these soluble salts, together with the carbonate, are active poisons.
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Chambers's Twentieth Century Dictionary
    • n Barium bā′ri-um the metal present in heavy spar (sulphate of baryta) and baryta, formerly thought to be white, but now known to possess a yellow colour
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Etymology

Webster's Revised Unabridged Dictionary
NL., fr. Gr. bary`s , heavy
Chambers's Twentieth Century Dictionary
From Baryta; cf. soda, sodium.

Usage

In literature:

Butler Burke of Cambridge has also made a series of experiments with radium and barium salts analogous to those of Dubois.
"The Mechanism of Life" by Stéphane Leduc
Other salts of barium of importance are barium chloride, barium nitrate, and barium carbonate, used in pyrotechny and in glass manufacture.
"The New Gresham Encyclopedia. Vol. 1 Part 3" by Various
To prevent discoloration of the fatty acids it is necessary to neutralize the lye with barium carbonate.
"Soap-Making Manual" by E. G. Thomssen
Preparation of barium nitrite, 327.
"The Phase Rule and Its Applications" by Alexander Findlay
The excess of lead was removed by sulphuric acid, and the sulphuric acid was removed by barium carbonate.
"Some Constituents of the Poison Ivy Plant: (Rhus Toxicodendron)" by William Anderson Syme
Lithofracteur, for instance, consists of 50% nitroglycerin and a mixture of prepared sawdust, kieselguhr and barium nitrate.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 9" by Various
Barium carbonate may be fed in the form of dough composed of four parts of meal or flour and one part of the mineral.
"House Rats and Mice" by David E. Lantz
Mention is here made of the formation of saccharates of barium, strontium, and calcium in low concentrations.
"The Philippine Agricultural Review" by Various
A few years ago phosphorescent salts of barium and calcium were employed in the manufacture of what was known as luminous paint.
"The Seven Follies of Science [2nd ed.]" by John Phin
To the filtrate ammonia is added, and then barium chloride, which precipitates the sulphur as barium sulphate.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3" by Various
In the same way, black fixe and barytes, or barium sulphate, also appeared to be useful in strengthening a paint.
"Paint Technology and Tests" by Henry A. Gardner
If necessary, the barium bath is repeated, as also the subsequent washings.
"Scientific American, Vol. XXXVII.--No. 2. [New Series.], July 14, 1877" by Various
Examples are wulfenite (PbMoO4) and barium antimonyl dextro-tartrate (Ba(SbO)2(C4H4O6).H2O).
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7" by Various
Isomorphous with heulandite is the strontium and barium zeolite brewsterite, named after Sir David Brewster.
"Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4" by Various
Usually a small amount of potassium is present replacing part of the barium.
"Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 1" by Various
The precipitate should next be collected, dried, and reduced with charcoal by the blow-pipe flame to the condition of barium sulphide.
"Memoranda on Poisons" by Thomas Hawkes Tanner
Certain crystals, like barium platinum cyanide, fluoresce when struck by the "X" rays.
"Physics" by Willis Eugene Tower
So that by a process of exclusion the writer was forced to think of barium as the main cause of the trouble.
"Barium, A Cause of the Loco-Weed Disease" by Albert Cornelius Crawford
Radium, also discovered in this analysis of 1898, was associated with barium.
"An Introduction to the History of Science" by Walter Libby
Bremer first suggested in 1898 for this purpose the fluorides of calcium, strontium or barium.
"Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 6" by Various
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In news:

CORNELIUS – Proceeds from Bethel Presbyterian Church's barbecue, bake sale, and silent auction on Sept 27 will provide Barium Springs Home for Children the household appliances needed for their group homes.
M y gut response to the mention of barium is resentment.
Volume 87, Number 3 p. Catching the crystallization of barium carbonate and silica.
Swedish chemist Karl Wilhelm Scheele distinguished baryta (a barium alkali) from lime in 1774, but the pure element was discovered by British chemist Sir Humphrey Davy in 1808.
Granville Summit resident Crystal Stroud's claim that she suffered barium poisoning by drinking well water contaminated by natural gas drilling has been refuted by a DEP investigation, DEP officials said on Thursday.
Revision of D4328 - 08 Standard Practice for Calculation of Supersaturation of Barium Sulfate, Strontium Sulfate, and Calcium Sulfate Dihydrate (Gypsum) in Brackish Water, Seawater , and Brines.
Twenty-six could not, because of the discomfort, and later underwent sedated colonoscopy or barium enema.
Granville Summit resident Crystal Stroud 's claim that she suffered barium poisoning by drinking well water contaminated by natural gas drilling has been refuted by a DEP investigation, DEP officials said on Thursday.
Revision of D4328 - 08 Standard Practice for Calculation of Supersaturation of Barium Sulfate , Strontium Sulfate , and Calcium Sulfate Dihydrate (Gypsum) in Brackish Water, Seawater, and Brines.
Advances in materials technology have lead to a mitigation of decreased capacitance in barium titanate-based MLCCs.
The fracking wastewater may contain metals released from the ground - such as barium, strontium and iron - as well as substances injected during the fracking operation.
Tests continue to show no barium danger west of Modesto where leaders want to build a freeway, officials said this week while crews showed neighbors how they obtain groundwater samples.
Overall during the sampling in Dimock, EPA found hazardous substances, specifically arsenic, barium or manganese, all of which are also naturally occurring substances, in well water at five homes at levels that could present a health concern.
BAK-4 glass Made from barium crown.
During the process of evaluating swallowing dysfunction, the videofluoroscopy or modified barium swallow study is an integral part of the armamentarium used for a complete evaluation.
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In science:

In this chapter we describe our success in measuring the vector ac-Stark or light shift ratios in two spin resonances of the barium ion.
Single barium ion spectroscopy: light shifts, hyperfine structure, and progress on an optical frequency standard and atomic parity violation
Determination of dipole and quadrupole polarizabilities of Ba+ by measurement of the fine structure of high-Ln = 9 and 10 Rydberg states of barium.
Single barium ion spectroscopy: light shifts, hyperfine structure, and progress on an optical frequency standard and atomic parity violation
Photoionization and photoelectric loading of barium ion traps.
Single barium ion spectroscopy: light shifts, hyperfine structure, and progress on an optical frequency standard and atomic parity violation
Stark shift of a single barium ion and potential application to zero-point confinement in a rf trap.
Single barium ion spectroscopy: light shifts, hyperfine structure, and progress on an optical frequency standard and atomic parity violation
Thirty-eight barium isotopes have so far been observed; the discovery of these isotopes is discussed.
Discovery of the Barium Isotopes
The tenth paper in the series of the discovery of isotopes, the discovery of the barium isotopes is discussed.
Discovery of the Barium Isotopes
Thus, about 42 isotopes have yet to be discovered and almost 50% of all possible barium isotopes have been produced and identified so far.
Discovery of the Barium Isotopes
Barium isotopes as a function of time when they were discovered.
Discovery of the Barium Isotopes
Figure A summarizes the year of first discovery for all barium isotopes identified by the method of discovery.
Discovery of the Barium Isotopes
The radioactive barium isotopes were produced using heavy-ion fusion evaporation (FE), light-particle reactions (LP), neutron-capture reactions (NC), spontaneous fission (SF), neutron induced fission (NF), charged-particle induced fission (CPF), and projectile fragmentation or fission (PF).
Discovery of the Barium Isotopes
In the following paragraphs, the discovery of each barium isotope is discussed in detail.
Discovery of the Barium Isotopes
Bogdanov et al. reported the discovery of 117Ba in 1977 in their article New Neutron-Deficient Isotopes of Barium and Rare-Earth Elements .
Discovery of the Barium Isotopes
The isotope was identified by chargedparticle-, neutron-, and gamma-gamma coincidence measurements: “To identify 120Ba, which has 18 neutrons less than the most abundant barium isotope, neutron-gamma coincidences had to be applied in addition to charged particle and gamma-gamma coincidence measurements.
Discovery of the Barium Isotopes
By four rapid chemical separations made at ten-minute intervals a cesium activity was obtained from the barium whose half-life and radiation characteristics agree with those reported for Cs127 .
Discovery of the Barium Isotopes
The induced barium activities were chemically separated and the half-life was measured with a Geiger counter: “The 2.4-day period is not 127Ba, otherwise it would produce 5.5-hour 127Cs as a daughter.
Discovery of the Barium Isotopes
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