barium sulfate


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barium sulfate:

see baritebarite
, barytes
[New Lat., from barium], or heavy spar,
a white, yellow, blue, red, or colorless mineral. It is a sulfate of barium, BaSO4, found in nature as tabular crystals or in granular or massive form and has a high specific gravity.
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Barium Sulfate

 

BaSO4, a salt; colorless crystals with a density of 4.5 g/cm3 and a melting point of 1580° C. This compound is virtually insoluble in water (2 mg per liter at 18° C) but is highly soluble in concentrated H2SO4 as a result of the formation of a complex compound. Barium sulfate is found in nature in the form of the mineral barite, which is the principal raw material for production of barium and its compounds. It is a component of the white pigment lithopone and is included in high-quality paper (which gives it its whiteness and smoothness). Petroleum workers use barium sulfate as a weighting material in drilling deep wells. This compound absorbs X rays well and is therefore used in fluoroscopic examinations, particularly of the gastrointestinal tract.

barium sulfate

[′bar·ē·əm ′səl‚fāt]
(inorganic chemistry)
BaSO4 A salt occurring in the form of white, rhombic crystals, insoluble in water; used as a white pigment, as an opaque contrast medium for roentgenographic processes, and as an antidiarrheal.

barite

A mineral used in concrete as an aggregate, esp. for the construction of high-density radiation shielding; also called barium sulfate.
References in periodicals archive ?
Fine-ground barium sulfate with a particle size of 8.
Barium sulfate (or Sulfate) is the inorganic compound with the chemical formula BaSO4.
The barium sulfate, mixed with nearly 40,000 tons of soil from the contaminated Latty Avenue site, was dumped in West Lake Landfill.
of BaO2 is formed by reaction of barium salt solution and hydrogen peroxide solution BaO2 crystallizes as grayish white transparent tetragonal crystals which are isomorphous with barium sulfate, which also gives a vivid green color, as do all barium compounds.
Key words: barium-impregnated polyethylene spheres, BIPS, barium sulfate suspension, gastrointestinal transit, avian, pigeon, Columba livia
Based on a report by the IRI Customs Administration, marble, cement, sulfur, plaster, salt, barium sulfate were among the main mineral materials exported from Iran last year.
Its basic composition is the same as that of MTA, the only difference being the addition of barium sulfate and calcium chloride.
Table 1--Oil Absorption Values for Selected Pigments--Rubout Method Pigment Oil Absorption Value Basic lead carbonate 9-12 Barium sulfate (Barytes) 10-20 Barium sulfate (Blanc Fixe) 15 Calcium carbonate 16-18 Zinc oxide 17-20 Red iron oxide 20 Uncoated titanium dioxide 11 Amorphous silica 29 China clay 30 Phthalocyanine blue 34 Milori blue 51 Lampblack 51 Carbon black (medium) 124 Diatomaceous earth 196 Data from a variety of sources.
Materials like tungsten, barium sulfate, and bismuth are used ro impart metallic qualities to polyolefins, PVC, ABS, nylon, and other engineering plastics.
The volunteers swallowed hard gelatin capsules filled with barium sulfate and were observed with videofluoroscopy.
Forms of scaling include calcium oxalate, calcium carbonate, barium sulfate, and pitch.