Definitions
from the GNU version of the Collaborative International Dictionary of English.
- noun Any rare earth element of the lanthanide series (atomic numbers 57 through 71).
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun chemistry Any of the 14
rare earth elements fromcerium (or fromlanthanum ) tolutetium in theperiodic table ; because theiroutermost orbitals are empty, they have very similarchemistry ; below them are theactinides .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any element of the lanthanide series (atomic numbers 57 through 71)
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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If you remember the Periodic Table of Elements from your high school chemistry class, rare earth refers to a group of 17 elements, also called lanthanide elements, with similar metallic characteristics, but differing from other metals.
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Depending upon which chemist you ask, rare earth elements consist of either: the so-called lanthanide series (elements having atomic numbers from 57 [corresponding to lanthanum] to 71 [corresponding to lutetium]) or the actinide (elements 89 to 103) and lanthanide series.
A Cloud in Every Silver Lining: The New Obstacle to a Green-Tech Revolution 2010
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Depending upon which chemist you ask, rare earth elements consist of either: the so-called lanthanide series (elements having atomic numbers from 57 [corresponding to lanthanum] to 71 [corresponding to lutetium]) or the actinide (elements 89 to 103) and lanthanide series.
Bill Chameides: A Cloud in Every Silver Lining: The New Obstacle to a Green-Tech Revolution 2010
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After a long, relentless campaign of price wars and export quota reductions, more than 95 per cent of the global supply of rare earth metals - a group of 17 "lanthanide" elements employed in hundreds of technologies ranging from mobile phones and BlackBerrys to lasers and aviation
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Depending upon which chemist you ask, rare earth elements consist of either: the so-called lanthanide series (elements having atomic numbers from 57 [corresponding to lanthanum] to 71 [corresponding to lutetium]
The Full Feed from HuffingtonPost.com Bill Chameides 2010
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In this connection, Dr. Seaborg demonstrated that the heavy elements form a "transition" series of actinide elements in a manner analogous to the rare-earth series of lanthanide elements.
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REE assay values are reported by convention as the combined oxide equivalents REO of the fifteen elements in the lanthanide series + yttrium.
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Roy next plans on analyzing alloys with added lanthanide, iron, and silicon.
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He hopes to soon expand his research and analyze alloys doped with lanthanide, iron, and silicon.
PhysOrg.com - latest science and technology news stories 2010
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It is included in the lanthanide group along with Description
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