In the 1930s it was found ( Beck ) that praseodymium dioxide could be precipitated from KOH / NaOH eutectic melts, by oxidation by electrochemistry, or by sodium chlorate.
32.
Praseodymium alloyed with nickel ( ) has such a strong magnetocaloric effect that it has allowed scientists to approach to within one milliKelvin, one thousandth of a degree of absolute zero.
33.
The most common is AB 5, where A is a rare earth mixture of lanthanum, cerium, neodymium, praseodymium and B is nickel, cobalt, manganese, or aluminium.
34.
Praseodymium dissolves readily in dilute sulfuric acid to form solutions containing green Pr ( III ) ions, which exist as a [ Pr ( OH 2 ) 9 ] 3 + complexes:
35.
Polycrystalline SrAl 12 O 19 : Mn is used as a green phosphor for plasma displays, and when doped with praseodymium or neodymium it can act as a good active laser medium.
36.
He saw several different colored versions which he named " praseodymium " ( green ) and " neodidymium " ( pink ); the latter then became the more common name for the element, neodymium.
37.
A typical composition might have been 46 % lanthanum, 34 % neodymium, and 11 % praseodymium, with the remainder mostly being samarium and gadolinium for material extracted from South African " rock monazite " from Steenkampskraal.
38.
Lanthanites include La, Ce, and Nd as major elements and often contain subordinate amounts of other REEs including praseodymium ( Pr ), samarium ( Sm ), europium ( Eu ) and dysprosium ( Dy ).
39.
Stroud ( SharkDefense, 2006 ) and Fisher ( VIMS ) observed captive cownose rays ( " Rhinoptera bonasus " ) changing swim elevation and ignoring blue crab baits in cages that contained neodymium-praseodymium mischmetal.
40.
"' Praseodymium "'is a chemical element with symbol "'Pr "'and atomic number 59 . Praseodymium is a soft, silvery, malleable and ductile metal in the lanthanide group.
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