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germanium

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

definition Germanium is a chemical element with symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Purified germanium is a semiconductor, with an appearance most similar to elemental silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature. Unlike silicon, it is too reactive to be found naturally on Earth in the free (native) state. more like this
notation
02.02.04 more like this
Ge more like this
source http://en.wikipedia.org/wiki/Germanium more like this
type
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broader
http://resource.geosciml.org/classifier/cgi/commodity-code/metalloid original
narrower germanium original
in scheme commodity-code original
is primary topic of germanium