  Cadmium shielding foil.
This is fairly thin cadmium foil said to come from a nuclear research facility and intended for use as radiation shielding. Lead is much more common as a shielding material, but cadmium works better for neutrons, which tells you this came from a serious place, as neutrons are not something you get from common radioactive minerals and the like.
Source: Anonymous
Contributor: Anonymous
Acquired: 24 December, 2007
Text Updated: 8 March, 2008
Price: Donated
Size: 5"
Purity: 99%
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