Nanografi Nanotechnology

*Cerium the second element in the Lanthanide series. This rare earth element is the most abundantly prevalent rare earth element. *Cerium element was named for the asteroid Ceres, this rare earth metal was discovered in 1801. Cerium rare earth element is discovered in 1803 by Klaproth and by Berzelius and Hisinger. *Cerium rare earth element is found some minerals including allanite,monazite, bastnasite, cerite, and samarskite. Today, monazite and bastnasite are more important sources of cerium rare earth element. In addition cerium metal is more abundant than Lead metal in earth’s crust. *Cerium rare earth metal is considered to be moderately toxic. And Cerium fire produce a harmful gas if pour water on it. *The metal tarnishes in moist air and reacts with water to form cerium hydroxide plus hydrogen gas. Small particles of the metal may ignite if a knife scratches the pure metal surface. *When cerium-lanthanum alloy uses with a sum of neodymium and praseodymium rare e...