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Pr
Praseodymium
Atomic no.:
59
Atom. weight: 140.90765
Density: 6
Class:
Rare earth metal
Melting point: 931°C
Boiling point: 3250°C
Colour: Array
   
Discoverer: Carl Auer von Welsbach
Place: Vienna, Austria
Year: 1885

Praseodymium was discovered in 1805 by Baron Auer von Welsbach in Vienna, Austria. Praseodymium is a soft, white metal and a member of the lanthanide group of elements. It closely resembles neodymium and, along with other elements of the same group, is found in the same minerals. It has an abundance in the earth's crust of 9.5 ppm. It reacts slowly with oxygen but rapidly with water. As a pure metal, its uses are limited; however, it is used as an alloying constituent for alloys used to make permanent magnets and flints. Along with neodymium, praseodymium is used to manufacture yellow glass which can be used as eye protection (e.g. for welders).

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 Neodymium high precision density-standard cube 1cm3  Art. Nr. 005030  
Neodymium high precision density-standard cube 1cm3
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SPECIAL OFFER!

Neodymium metal -  high precision density-standard cube 10x10x10mm, 7 grams in Ampoule under Argon - NEW!

Without argon this cube would turn black within a few minutes.

The cube comes without engraving but the ampoule is labelled.

Using finest materials, each density cube was lapped to 10x10x10mm by a mechanical engineering company with an accuracy of 0.01 millimeter. Each one separately ground and polished it represents the theoretical density of the respective element by its weight. The weight is not affected by the laser inscription. Information such as element symbol, name and density is durable burned at the surface. Each element even shows its specific characteristis in colour and reaction with the laser. Altogether 25 elements are planned in a complete set in a wooden case.
standard price 170,48€ - Special offer valid until May 24, 2019

Amount: 1 St. / 1 pc..
Purity : 99.95%
Packing: PE - bag
153.00
- tax free
5-9 pcs.: 146.00 Euro
Availability: 9 in stock

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