neodymium

Definitions

  • WordNet 3.6
    • n neodymium a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium
    • ***
Webster's Revised Unabridged Dictionary
    • n Neodymium (Chem) The chemical element of atomic number 60, one of the rare earth elements. Symbol Nd. Atomic weight 144.27.It is a rare metallic element occurring in combination with cerium, lanthanum, and other rare metals, and forming amethyst-colored salts. It was originally thought to be part of a supposed new element didymium, obtained from cerite in 1843. Later this was resolved into two elements, neodymium and praesodymium by von Welsbach in 1885. It is chiefly trivalent. It is a faintly yellow metal.
    • ***
Century Dictionary and Cyclopedia
    • n neodymium An element which occurs in cerite, albanite, and other comparatively rare minerals. In 1803 Berzelius and Hisinger recognized as containing a new metallic oxid an earth-like substance extracted from cerite and gave to the metal the name cerium. In 1839 Mosander showed that this oxid contained a second metal, which he named lanthanum, and in 1841 the same chemist proved that there was also present still another metal, which he called didymium. In 1885 Auer von Welsbach succeeded, by a most laborious series of fractional crystallizations of certain suits of the didymium of Mosander, in resolving these into salts of two distinct metals, for which he proposed the names neodymium, and praseodymium, respectively. Neodymium has the higher atomic weight of the two: it forms a single oxid of faint bluish-gray tint and its salts are characterized by a bright rose-red color inclining to violet red, affording special absorption and emission spectra. Neodymium is present in larger proportion than praseodymium in the original didymium compounds of Mosander.
    • ***

Etymology

Webster's Revised Unabridged Dictionary
NL. Dee Neo-, and Didymium

Usage

In literature:

Probably also Neodymium and Praseodymium are two of them, for their weights are 143.6, 140.5.
"Occult Chemistry" by Annie Besant and Charles W. Leadbeater
Neodymium and Praseodymium discovered by Welsbach.
"The Progress of Invention in the Nineteenth Century." by Edward W. Byrn
***

In news:

Bunting Magnetics Co. Newton, KS, has expanded its inventory of products available online, including additions to its bonded neodymium, sintered neodymium, samarium cobalt, alnico and ceramic magnet product lines.
The two-way enclosures feature the 12-inch Black Widow BWX-DVC Neo loudspeaker with dual voice coil, push-pull technology, and a neodymium magnet.
The Impulse 12D features a ribbon driver and 12-inch Black Widow loudspeaker with dual voice coil, push-pull technology, and a neodymium magnet.
It uses a turbine vane impeller and rare earth Neodymium magnets for synchronous drive, with no slippage and less internal heat, according to Magnatex.
However, before you rush out to buy neodymium magnets to create your own shark- repelling gear, Herrmann cautions that the magnets appear to have an effective range of only 10 inches.
The concentrated light would then strike a two-layer ceramic disk known as a Neodymium and Chromium co-doped YAG (yttrium aluminum garnet) laser material.
SuperBeam headsets use neodymium magnets in the speakers, providing a wide frequency response of 20Hz - 20KHz.
At the heart of each earpiece, a 40mm neodymium driver offers impressive power handling ideal for high maximum sound pressure levels.
The new products consist of additions to the bonded neodymium, sintered neodymium, samarium cobalt, alnico and ceramic magnet product line s.
Instead, they hope to strike neodymium, europium and other exotic-sounding rare earth metals -- a group of 15 elements, plus two others with similar properties, used in clean-energy technology, military hardware and cell phones.
Rare earth elements (REEs) like neodymium and dysprosium can produce high-flux permanent magnets that can tolerate extreme temperatures without the threat of demagnetization.
The need for rare-earth minerals like neodymium could define the relationship between the United States and China and elevate Idaho into a critical role in the nation's industrial future.
These brushless motors feature a 4 pole 12 slot hi-torque design with neodymium sintered magnets and are even rebuildable.
These geometric beech wood shakers are cleverly embedded with neodymium magnets to enhance their attraction—to each other.
***

In science:

Nd II λ 5293.163 ˚A and Nd III λ 5294.099 ˚A lines show the example of the lines of the second and the third spectra of neodymium.
About the chemical composition of delta Scuti - the prototype of the class of pulsating variables
Migus, “Generation of spatially incoherent short pulses in laser-pumped neodymium stoichiometric crystals and powders,” J.
Threshold of a random laser based on Raman gain in cold atoms
Migus, “Generation of spatially incoherent short pulses in laser pumped neodymium stoichiometric crystal powders,” J.
Modes of Random Lasers
We emphasize that although the entangled state involves only one excitation, the observed entanglement shows that the stored excitation is coherently delocalized among all the neodymium ions in resonance with the photon, meaning roughly 1010 ions in each crystal.
Heralded quantum entanglement between two crystals
Luminescence and stimulated emission of neodymium in sodium lanthanum molybdate powders.
A cold-atom random laser
***