Neodymium atomic weight

Neodymium, determination of atomic weight of, in neodymium oxalate, 2 61 separation of, from samarium from monazite, as magnesium nitrate double salt, 2 56, 57... 

Neodymium oxalate, determination of atomic weight of neodymium in, 2 60... 

For example, the isotopic composition and the atomic weight of neodyminm," dysprosium and erbium have been determined using synthetic mixtnres prepared gravimetrically from highly enriched isotopes of neodymium in the form of oxides of weU defined pnrity by TIMS. No natnral isotopic variation was found in terrestrial neodymium, dysprosium or erbium samples. These isotopic compositions of Dy and Er measnred by TIMS are accepted as the best measurements from a single terrestrial source as noted in the table of isotopic composition of elements, 2001. °... 

Brauner s later work on the atomic weights of rare-earth elements over a period of years was, in general, very accurate. He also used volumetric methods. In 1882 he concluded that didymium is complex, but since Cleve published on this at the same time he gave up the work in deference to him. Auer von Welsbach first separated didymium into praseodymium and neodymium, but Brauner found that he had inverted the atomic weights. 

Similarly, this raises questions regarding the determination of isotope amount ratios of neodymium or osmium - is it adequate to use the ratio for nonradiogenic isotopes for the mass bias correction of other isotope ratios Are they indeed invariant in Nature The 2009 lUPAC report on Atomic Weights addressed this question rather explicitly by abrogating the conventional notation of Standard Atomic Weights in favor of the interval of the Standard Atomic Weights [57]. Furthermore, concerning the mass bias correction, it is now established that mass bias correction factors are not identical for all isotopes of the same element. Hence the limitations of traditional mass bias correction methods must be accepted. 

Number 1 Element Hydrogen Symbol H Atomic Weight 1.008 [1.00784 1.00811] Number 60 Element Neodymium Symbol Nd Atomic Weight 144.242(3)... 

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