rhenium
Instance URI: http://resource.geosciml.org/classifier/cgi/commodity-code/rhenium
Within scheme: South Australian Commodity Codes
Rhenium is a chemical element with the symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust.