Commodity Code

silica

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

definition Silicon dioxide, also known as silica (from the Latin silex), is a chemical compound that is a dioxide of silicon with the chemical formula SiO2 more like this
notation
01.02.37 more like this
Silc more like this
source http://en.wikipedia.org/wiki/Silica more like this
type
Resource
Concept
broader industrial mineral
narrower silica
in scheme commodity code
is primary topic of silica
narrower chert
broader silica