Commodity Code

tantalum

http://resource.geosciml.org/classifier/cgi/commodity-code/tantalum

definition Tantalum is a chemical element with the symbol Ta and atomic number 73. Previously known as tantalium, its name comes from Tantalus, a character from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as minor components in alloys. The chemical inertness of tantalum makes it a valuable substance for laboratory equipment and a substitute for platinum. more like this
notation
02.01.24 more like this
Ta more like this
source http://en.wikipedia.org/wiki/Tantalum more like this
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Resource
Concept
broader metal
narrower tantalum
in scheme commodity code
is primary topic of tantalum