What is Terbium Used for?

Terbium (Tb), a member of the lanthanide, is a silvery-white rare earth metal. It is used in fluorescent lamps, electric devices, and making CD. It is also used to dope calcium fluoride, calcium tungstate, and strontium molybdate, used in solid devices. The oxide is used as a potential activator for green phosphorous used in colour TV tubes.