This element occurs in various rare earth minerals, usually associated with yttrium.
This element occurs in various rare earth minerals, usually associated with yttrium. It is the rarest of the rare earths, and ranks 59th in the order of abundance of the elements in the earth's crust. A radioactive isotope with a half life of 30 billion years is used to determine the age of meteorites in relation to the earth's age. FTP, name this silvery white metal with atomic number 71, which was discovered in 1907 by the chemist Georges Urbain, and was named for the ancient name of Paris.
This element occurs in various rare earth minerals, usually associated with yttrium.
{Lutetium}