REE is used in the following components:
•        Capacitors
•        Sensors
•        Colorants
•        Scintillators

Rare earth elements:  Scandium, Yttrium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Lanthanum, Cerium, Praseodymium, Neodymium, Samarium, Europium, Gadolinium.