PR

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Related to praseodymium: neodymium

PR

The two-character ISO 3166 country code for PUERTO RICO.

PR

In numismatics, an abbreviation for proof. An equivalent abbreviation is PF.

Pr

Used on the consolidated tape to indicate preferred stock: GMPr 80 1/2 .

PR

see PUBLIC RELATIONS.
References in periodicals archive ?
It can be seen from the Fig 6 and 7 that both e' and e" decrease with the increase of Praseodymium concentration.
Neodymium and praseodymium are both in high demand for the manufacture of permanent magnets used in the expanding wind turbines, hybrid cars and personnel electronics industries.
The three electropositive metal bars (~2 cm x 2 cm x 10 cm) comprised neodymium (76%), praseodymium (23%), and minor amounts (< 0.
University of Dayton, Dayton, Ohio has received a patent for solid corrosion-inhibiting conversion coating formed on a substrate metal, the conversion coating is comprised of a rare earth element and an inorganic valence stabilizer combined to form a rare earth/valence stabilizer complex within the solid corrosion-inhibiting conversion coating, wherein the rare earth element is selected from cerium, praseodymium, terbium, or a combination thereof, and at least one rare earth element is in the tetravalent oxidation state in the rare earth/valence stabilizer complex in the solid corrosion-inhibiting conversion coating.
Names as unpronounceable as sauropods will hover in the air as he sinks into sleep: praseodymium, dysprosium, rhenium, ytterbium, and then all of the unnamed, coded elements beyond the 100s, unununium (111), ununbium (112), ununquadium (114).
According to Dudley Kingsnorth, Executive Director of the Industrial Minerals Company of Australia, Mt Pass will recommence operation--extracting neodymium and praseodymium from their railings--hopefully in 2008.
2006) found that substituting praseodymium (Pr) for lanthanum increases the entropy change and adiabatic temperature change when magnetized from 0 to 5 Tesla by more than 30% compared to a similar material with no lanthanum substitution.
The scientists are working with the following lanthanide oxides: lanthanum, cerium, praseodymium, neodymium, samarium and gadolinium.
The scientists are working with seven lanthanide oxides: lanthanum, which is used in carbon lighting applications and optical glass manufacturing; cerium, used as a catalyst in sell-cleaning ovens; praseodymium, commonly used in an alloy found in lighter flints and carbon electrodes for are lighting; neodymium, used for coloring glass and ceramics and for filtering infrared radiation; samarium, used in magnets, in alloys with cobalt, and in nuclear reactors: and gadolinium, which is also used in magnets.
Rare-earth elements are so uncommon that you may never have heard of lutetium (element 71), dysprosium (element 66), praseodymium (element 59), or the like.
Didymium, however, proved to be a mixture itself and was separated into neodymium (Nd) and praseodymium (Pr) in 1885 by the Austrian chemist Karl Auer von Welsbach (1858-1929).
Boatner, Structural refinements of praseodymium and neodymium orthophosphate.