from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A bright, silvery rare-earth metal element, found in monazite and bastnaesite and used for coloring glass and for doping some glass lasers. Atomic number 60; atomic weight 144.24; melting point 1,024°C; boiling point 3,027°C; specific gravity 6.80 or 7.004 (depending on allotropic form); valence 3. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A metallic chemical element (symbol Nd) with an atomic number of 60.
from the GNU version of the Collaborative International Dictionary of English
- n. The chemical element of atomic number 60, one of the rare earth elements. Symbol Nd. Atomic weight 144.27.
from The Century Dictionary and Cyclopedia
- n. An element which occurs in cerite, albanite, and other comparatively rare minerals.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium
The magnets, manufactured mostly in China, were called neodymium magnets.
It takes 2-4 pounds per Prius, and Japan has had to buy much of their neodymium from the Chinese black market.
That light gets funneled into a crystal of a material called neodymium-doped yttrium orthovanadate, which is common to lab lasers.
The U.S. has become almost completely dependent on China for rare earth metals, including neodymium, which is used in hard disk drive magnets, according to testimony at a congressional hearing last month.
The size of the headphone doesn't necessarily relate to magnetic strength; small, portable ones typically use neodymium, which is one of the most powerful and concentrated magnetic substances, Maisel said.
The size of the headphone doesn't necessarily relate to magnetic strength; small, portable ones typically use neodymium, which is one of the most powerful and concentrated magnetic substances, Dr. Maisel said.
Other minerals, such as neodymium (crucial for hard-disk drives and wind turbines), europium (used in lasers), cerium (which reduces carbon monoxide in engine exhaust), and lanthanum (key for many hybrid and electric-car batteries), would face a combined export quota of 35,000 tons annually — woefully insufficient to fill global needs.
The theory predicts levitation forces of up to 50 metric tons per square meter of magnet array using modern permanent magnet materials such as neodymium-iron-boron.
In addition to the Prius, rare-earth minerals such as neodymium and dysprosium are used in motor magnets in Nissan Motor Co.'s all-electric Leaf car, General Motors Co.'s plug-in Volt and Honda Motor Co.'s Insight hybrid, as well as in mobile phones and rechargeable batteries.
The audio system's speakers use "neodymium" magnets instead of iron magnets to shave off an additional 5 gram per speaker.