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Say barium and what do most people think of? Ugh I believe is a common reaction. Let's just say it's a good x-ray contrast medium and leave it at that.
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Rough octahedra under oil.
I'm not sure what process resulted in these shapes: They look sort of crystal-like in overall shape, but the surface looks more mechanically-formed than crystalline. As an alkali earth, barium is reactive enough that it must be kept under oil to prevent rapid deterioration into barium oxide.
Source: David Franco
Contributor: Ed Pegg Jr
Acquired: 16 August, 2002
Price: $23
Size: 0.3"
Purity: 99.5%
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Sample from the Everest Element Set.
Up until the early 1990's a company in Russia sold a periodic table collection with element samples. At some point their American distributor sold off the remaining stock to a man who is now selling them on eBay. The samples (excepted gasses) weight about 0.25 grams each, and the whole set comes in a very nice wooden box with a printed periodic table in the lid.
To learn more about the set you can visit my page about element collecting for a general description and information about how to buy one, or you can see photographs of all the samples from the set displayed on my website in a periodic table layout or with bigger pictures in numerical order.
Source: Rob Accurso
Contributor: Rob Accurso
Acquired: 7 February, 2003
Price: Donated
Size: 0.2"
Purity: >99%
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