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REE Facts | HREE Facts | LREE Facts | Rare Metal Resource
LREE : 57 Lanthanum | 58 Cerium | 59 Praseodymium | 60 Neodymium | 61 Promethium | 62 Samarium | 63 Europium | 64 Gadolinium
HREE : 65 Terbium | 66 Dysprosium | 67 Holmium | 68 Erbium | 69 Thulium | 70 Ytterbium | 71 Lutetium | 39 Yttrium
Heavy Rare Earth Elements, HREE, REE Facts, ProEdge Media Corp., InvestorIntel
What Are Heavy Rare Earth Elements?
Tracy Weslosky, Editor, InvestorIntel
Source: REE Handbook

Have you ever wondered about what a heavy rare earth element (HREE) is? Or maybe you have wondered how are HREEs used?

HREEs are a group of eight elements on the periodic table between terbium with the atomic number 65 and lutetium with the atomic number 71. The group of HREEs also includes Yttrium with atomic number 39. All HREEs have paired electrons - a clockwise and counter-clockwise spinning election.

The eight HREEs are:

Terbium (Tb): With the atomic number 65, terbium is an additive in neodymium-iron-boron (NdFeB) magnets in hybrid and electric vehicle motors allowing them to operate at high temperatures.

Dysprosium (Dy): With the atomic number 66, dysprosium is used in radiation badges to detect and monitor radiation exposure. Dysprosium is also used as a coating on compact disks (CD) for digital data, music, and video storage.

Holmium (Ho): With atomic number 67, holmium is used as colorant in cubic zirconia, for use in jewelry to yield peach and yellow tones.

Erbium (Er): With atomic number 68, erbium is added to cubic zirconia jewelry, decorative glass, and ceramic glazes to create a delicate light pink colour.

Thulium (Tm): With atomic number 69, thulium is the rarest of the rare earth elements. Thulium:Glass lasers are used in various medical procedures to cut and cauterize.

Ytterbium (Yb): With atomic number 70, ytterbium is the only element named by combing the names of two other elements, yttrium and erbium. Ytterbium lasers are used to drill into diamonds to remove imperfections.

Lutetium (Lu): With atomic number 71, lutetium is the last of the heavy-group rare-earth elements. Lutetium is the most expensive of the lanthanide elements. High-refractive index optical lenses made of lutetium aluminum garnet (LuAG) are used in manufacturing high-tech integrated circuits (ICs).

Yttrium (Y): With atomic number 39, yttrium based lasers (Nd:YAG) are used commercially in industrial, medical, graphic arts, and defense applications. These laser beams are used for precision cutting, welding, etching, boring, ranging and targeting.

For more information visit www.REEHandbook.com – The ultimate guide to Rare Earth Elements.

Heavy Rare Earth Elements, HREE, REE Facts, ProEdge Media Corp., InvestorIntel
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