The Definition of REE:
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REE : Rare Earth Element
– noun Chemistry .
any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons.
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Elements of REE & Their Uses:
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Z
|
Symbol
|
Name
| Selected Usages |
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58
|
Ce
|
Cerium
|
Used in catalytic converters to reduce CO emissions, especially in diesel fuels. Fuel cells for hydrogen production, television glass screens to prevent darkening, steel and aluminum manufacturing, permanaent magnet manufacturing, carbon arc lighting and as an oxidizing agent in organic chemistry and manufacturing of electronic components, chemical oxidizing agent, polishing powder, yellow colors in glass and ceramics, catalyst for Self-cleaning oven etc. |
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66
|
Dy
|
Dysprosium
|
Rare-earth magnets, lasers, control rods of nuclear reactors, data storage manufacturing for computer hard discs, transducers, wide-band mechanical resonators and high-precision liquid fuel injectors, for measuring radiation, as a catalyst to harden materials, and in high intensity lighting. |
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68
|
Er
|
Erbium
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Lasers for medical and industrial usage and added to vanadium in the manufacture of steel. Used in coloring glass and porcelain and in optical communications. |
|
63
|
Eu
|
Europium
|
Red and blue phosphors, lasers, mercury-vapor lamp.
|
|
64
|
Gd
|
Gadolinium
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Rare-earth magnets, high refractive index glass or garnets, lasers, x-ray tube, computer memory, neutron capture, to treat tumors in neutron therapy and as a MRI imaging contrast agent, x-ray imaging and PET scans, a number of uses in nuclear reactors and nuclear driven ships and submarines, numerous chemical reactions. |
|
67
|
Ho
|
Holmium
|
Lasers, nuclear reactors (control rods) , strengthening magnetic fields in magnets (highest magnetic strength of any element), coloring agent in glass i.e. spectrophotometers. |
|
57
|
La
|
Lanthanum
|
High refractive index glass, flint, hydrogen storage, battery-electrode, camera lens, electron microscopes, vacuum tubes, Hall thrusters for spaceships, fiber-optic communication systems, motion picture lighting systems, steel production, petroleum industry. |
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71
|
Lu
|
Lutetium
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Catalyst in petroleum cracking in refineries, aging of meteorites, lens manufacturing, medical PET scans, magnetic memory devices. |
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60
|
Nd
|
Neodymium
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Rare-earth magnets, lasers, violet colors in glass and ceramics, ceramic capacitor, radioactive geological dating. Rare-earth magnets (strongest permanent magnets known), high energy lasers, violet colors in glass and ceramics and paints, ceramic capacitor. |
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61
|
Pm
|
Promethium
|
Nuclear battery |
|
59
|
Pr
|
Praseodymium
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Rare-earth magnets, lasers, green colors in glass and ceramics, flint, strengthening of metals for aircraft engines, Movie studio lighting, fibreoptics, oxidation catalyst. |
|
62
|
Sm
|
Samarium
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Rare-earth magnets, Lasers, neutron capture, used in nuclear reactors, chemical reactions, cancer treatment, petrochemical industry, optical glass manufacturing. |
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65
|
Tb
|
Terbium
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Green phosphors, lasers, fluorescent lamp, fuel cells, electronic devices such as sonar sensors and magnetomechanical devices. |
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69
|
Tm
|
Thulium
|
Portable medical diagnostic x-rays, magnetic ceramic materials in microwave material, lasers, high temperature superconductors |
|
70
|
Yb
|
Ytterbium
|
Infrared Laser, chemical reducing agent, High-temperature-superconductors (YBCO) |
all the information is public knowledge and is available from Wikipedia
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