anglais » arabe

anglais)

rare earths

rare earths CHIM

rare earths CHIM

anglais

This divide is reflected in the first two rare earths that were discovered: yttria (1794) and ceria (1803). en.wikipedia.org

An average 83% recovery of rare earths in the acid leach stage was achieved from the bulk sample. www.proactiveinvestors.com.au

While working on rare earths, in 1879 he discovered scandium. en.wikipedia.org

This carries high grades of neodymium, praseodymium, lanthanum, and cerium with a small amount of heavy rare earths in the deposit. www.proactiveinvestors.com.au

anglais