from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A lustrous, iron-gray, malleable metallic rare-earth element that occurs chiefly in the minerals monazite and bastnaesite, exists in four allotropic states, is a constituent of lighter flint alloys, and is used in various metallurgical and nuclear applications. Atomic number 58; atomic weight 140.12; melting point 795°C; boiling point 3,468°C; specific gravity 6.67 to 8.23; valence 3, 4. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A metallic chemical element (symbol Ce) with an atomic number of 58.
from the GNU version of the Collaborative International Dictionary of English
- n. A rare metallic element, occurring in the minerals cerite, allanite, monazite, etc. Symbol Ce. Atomic weight 141.5. It resembles iron in color and luster, but is soft, and both malleable and ductile. It tarnishes readily in the air.
from The Century Dictionary and Cyclopedia
- n. Chemical symbol, Ce; atomic weight, 141.5; specific gravity, 5.5. A metal discovered in 1803 by Klaproth, Hisinger, and Berzelius independently.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group
That set off a surge in prices for rare-earth minerals such as lanthanum, often used to make catalysts for refineries, and cerium, which is sometimes used in glass.
Calcium and a rare earth element called cerium hint at the extent of the world's deserts, while sodium is a measure of ocean storminess and sea spray.
It mined europium, which forms the basis of the high-efficiency lighting industry; lathanam, without which it would be difficult to refine gas; and cerium, which is used to polish the glass on computer screens and cellphones.
Some glass makers use abrasive that contains a rare earth element called cerium, whose supply was already tight after the Chinese government cut rare earth exports for 2010 by 40
It mined europium, which forms the basis of the high-efficiency lighting industry; lanthanum, without which it would be difficult to refine gas; and cerium, which is used to polish the glass on computer screens and cellphones.
And there are other metals, such as cerium, which, giving a still more complex spectrum, would doubtless be still more numerously resolved.
But those deposits are skewed toward "light" rare earths such as cerium and lanthanum, while "heavy" elements such as dysprosium, terbium and europium are more in focus in
But those deposits are skewed toward "light" rare earths such as cerium and lanthanum, while
Rare earth elements such as cerium are components of the strongest known magnets.
months, Molycorp and Lynas's deposits are skewed to "light rare earths" such as cerium and lanthanum, meaning major holes in the supply chain will still remain.