Vanadium steel, infrared lasers, and fiberoptics lasers, including some used for medical purposes.
Europium Eu
Used to prepare red and blue phosphors (marks on Euro notes that prev ent counterfeiting,) in lasers, in fluorescent.
Cerium Ce
Used to give a yellow color to glass, as a catalyst, as a polishing powder, and to make flints.
Ytterbium Yb
Health care applications, including in certain cancer treatments; stainless steel and for monitoring effects of earthquakes, explosions.
Lanthanum La
High refractive index glass, camera lenses and catalysts.
Praseodymium Pr
Lasers, arc lighting, magnets, flint steel, and as a glass colorant, in high-strength metals found in aircraft engines and in flint for starting fires.
Samarium Sm
Lasers, magnets, masers, nuclear reactor control rods.
Gadolinium Gd
Lasers, x-ray tubes, computer memory, high refractive index glass.
Scandium Sc
Light alloys for the aerospace industry, as a radioactive tracer, and in lamps.
Thulium Tm
One of the least abundant rare earths. Used in lasers, metal halide lamps, and portable x-ray machines.
Dysprosium Dy
Permanent rare earth magnets; Lasers and commercial lighting; hard computer discs and other electronics; nuclear reactors and modern, energy-efficient vehicles
Lutetium Lu
Positron emission tomography (PET) scans, high refractive index glass, catalysts, and LEDs.
Neodymium Nd
Some of the strongest permanent magnets available; used to give violet color to glass and ceramics, in lasers, capacitors, and electric motorsdiscs.
Promethium Pm
The only naturally radioactive rare earth element. Used in luminous paint and nuclear batteries.
Holmium Ho
Use in lasers, magnets, and calibration of spectrophotometers can be used in nuclear control rods and microwave equipment
Terbium Tb
Used in green phosphors, magnets, lasers, fluorescent lamps, magnetostrictive alloys, and sonar systems.
Ytrrium Y
Used in yttrium aluminium garnet (YAG) lasers, as a red phosphor, in superconductors, in fluorescent tubes, in LEDs, and as a cancer treatment.
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