Chemical elements
  Neodymium
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Element Neodymium, Nd, Lanthanide





History

Neodymium was discovered by separating the components of alleged element didymium.

Mosander extracted the rare earth didymium from lanthana. Later it was concluded that didymium was in fact two elements. In 1879 Francois Lecoq de Boisbaudran showed that it contained samarium.

After three years Carl Auer von Welsbach separated the residual didymium into two earths, the elements of which were named as praseodymium (green twin) and neodymium (new twin) so retaining a part of the original name, with a new suffix "neo" - new.


Occurrence

Lanthanide Neodymium is the second most abundant of all lanthanides. Its crustal concentration exceeds that of lanthanum, 2.5x10-3 and 1.8x10-3% respectively, 9.2x10-6 mg/L in seawater. With other rare earth elements of the cerium subgroup it is found in minerals monazite and bastnasite (up to 20% Nd2O3) as well as in loparite and its own mineral aeschynite, which contains oxides of calcium, thorium, tantalum, niobium, yttrium, lanthanum, and lanthanides with cerium and neodymium domination. Natural neodymium has 7 isotopes, with mass numbers from 142 to 146 as well as 148 and 149.

Neighbours



Chemical Elements

38Sr
87.6
Strontium
39Y
88.9
Yttrium
40Zr
91.2
Zirconium
59Pr
140.9
Praseodymium
60Nd
144.2
Neodymium
61Pm
[145.0]
Promethium
88Ra
226.0
Radium
89Ac
[227.0]
Actinium
104Rf
[257.0]
Rutherfordium

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