Rare earth elements are a group of seventeenchemical elements that occur together in the periodic table. The group consists of yttrium, scandium, and fifteen lanthanide elements (lanthanum, cerium, thulium, ytterbium, praseodymium, gadolinium, terbium, dysprosium, neodymium, promethium, samarium, europium, holmium, erbium, and lutetium). The seventeen rare earth elements are found in all rare earth elements deposits; however, their distribution and concentration varies. These elements are ... Read more