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Topic: Barium


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In the News (Mon 18 Mar 19)

  
  Barium - Wikipedia, the free encyclopedia
Barium is a chemical element in the periodic table that has the symbol Ba and atomic number 56.
Barium oxide is used in a coating for the electrodes of fluorescent lamps, which facilitates the release of electrons.
Barium (Greek "barys" meaning "heavy") was first identified in 1774 by Carl Scheele and extracted in 1808 by Sir Humphry Davy in England.
en.wikipedia.org /wiki/Barium   (611 words)

  
 Barium sulfate - Wikipedia, the free encyclopedia
The mineral barite is composed largely of barium sulfate and is a common ore of barium.
Although barium is a heavy metal, and its water soluble compounds are often highly toxic, the extremely low solubility of barium sulfate protects the patient from absorbing harmful amounts of the metal.
Barium sulfate is used as a filler in plastics and as a component of oil well drilling fluid to increase the density.
en.wikipedia.org /wiki/Barium_sulfate   (301 words)

  
 Barium   (Site not responding. Last check: 2007-09-20)
Barium is a trace element which can apparently affect thyroid function and which may be especially toxic for persons with thyroid disease, especially hyperthyroidism.
Barium sulfate (BaSO4) is commonly used as a contrast medium in radiography of the intestinal tract.
Barium seems to cause the same reduced permeability to potassium and this may be its mode of toxicity.
www.ithyroid.com /barium.htm   (710 words)

  
 ATSDR - ToxFAQs™: Barium and Compounds
Barium compounds, such as barium chloride, barium nitrate, or barium hydroxide, that dissolve easily in water usually do not last in these forms for a long time in the environment.
The barium in these compounds that is dissolved in water quickly combines with sulfate or carbonate that are naturally found in water and become the longer lasting forms (barium sulfate and barium carbonate).
Geometric mean barium level measured in the U.S. general population aged 6 and older is reported by CDC as 1.44 µg/g creatinine (measured in urine).
www.atsdr.cdc.gov /tfacts24.html   (1048 words)

  
 EPA Ground Water & Drinking Water > breadcrumb? > Consumer Factsheet on: BARIUM
Barium is a lustrous, machinable metal which exists in nature only in ores containing mixtures of elements.
Barium is released to water and soil in the discharge and disposal of drilling wastes, from the smelting of copper, and the manufacture of motor vehicle parts and accessories.
Barium does not bind to most soils and may migrate to ground water.
www.epa.gov /OGWDW/dwh/c-ioc/barium.html   (911 words)

  
 It's Elemental - The Element Barium
Barium is used as a getter, a material that combines with and removes trace gases from vacuum tubes.
Barium carbonate is used to purify some chemical solutions and is the primary base material for the manufacture of other barium compounds.
Barium nitrate (Ba(NO) burns with a bright green color and is used in signal flares and fireworks.
education.jlab.org /itselemental/ele056.html   (342 words)

  
 Barium   (Site not responding. Last check: 2007-09-20)
Barium is a metallic element, soft, and when pure is silvery white like lead; it belongs to the alkaline earth group, resembling calcium chemically.
All barium compounds that are water or acid soluble are poisonous.
Naturally occurring barium is a mixture of seven stable isotopes.
www.scescape.net /~woods/elements/barium.html   (224 words)

  
 Barium   (Site not responding. Last check: 2007-09-20)
An alkaline earth element, barium is also a toxic heavy metal.
Minerals containing barium were identified by Karl Scheele in 1774 from which the pure metal was electrolysed by Humphrey Davy in 1808.
Barium is used in our laboratory to demonstrate solubility and conductivity, and in the study of double replacement reactions.
chemlab.pc.maricopa.edu /periodic/ba.html   (70 words)

  
 Chemistry : Periodic Table : barium : key information
Barium is a metallic element, soft, and when pure is silvery white like lead.
Barium metal is available commercially and there is normally no need to make it in the laboratory.
Barium metal can also be islated from the reduction of barium oxide, BaO, with aluminium.
www.webelements.com /webelements/elements/text/Ba/key.html   (329 words)

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