RE: Barium Sulfate

["Tupin, Edward A. 301-827-1230 Fax 594-4760" <EAT@CDRH.FDA.GOV>]

NCRP Report 49 notes (P. 11):

"Plaster containing barium provides higher attenuation than common 
plaster and has been used for low voltage x-ray installations.  Its 
disadvantages are that considerable care is necessary to ensure uniform 
density, it is more apt to develop cracks with age than common plaster 
and the cost of installation is higher."

Baryte (also spelled barite) is the crystalline form of barium sulfate, 
and can be used as aggregate to produce high density or "loaded" 
concrete, with a density about 1/3 greater than regular concrete.

The same report lists barium sulfate in "Table 25-Densities of common 
building materials"  on P.86, but does not elaborate further.

Barium sulfate (natural barite) 4.5 g/cm^3       280 lb/ft^3


A slightly different use, also because of its high density:
Barium sulfate is the material used as contrast media during 
fluoroscopic examination of the gastro-intestinal tract, e.g. it is the 
stuff you swallow during the "upper GI study".  


Hope this helps.

The preceeding is the personal commentary 
of the author
Ed Tupin
RSO, Center for Devices and Radiological Health
EAT@cdrh.fda.gov
(301) 827-1230
Fax:  (301) 594-4760