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Praseodymium of metellicheskiya

Praseodymium of metellicheskiya

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0.89 EUR
Ukraine, Kiev
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Name of products: Praseodymium of metellicheskiya - 99,5%

Russia, China, Japan
In steel drums on 50 kg in net weight everyone

Chemical sostavvsy RZM (TREM)98,37 of %
Pr/TREMmin of 98,29%

Praseodymium (Pr) - chemical element from group of lanthanides, has been discovered in 1885 by the Austrian chemist Karl Velsbakh who has separated the rare-earth metal earlier known as a didymium and being considered as one element, on two elements: praseodymium (Greek light green) and neodymium (new didymium).

Praseodymium salts in the majority really light green, and externally not to distinguish metal from lanthanum and cerium - silver-white, covered with an oxide film.

Praseodymium is a part of such minerals as bastnezit, the monocyte, loparit, etc. Receive in mix with other rare-earth elements. Praseodymium concentrates together with light lanthanides and separates together with neodymium. Further praseodymium is separated from neodymium and transferred to pure metal of a metallotermicheska or electrolysis at 850 °C.

On air praseodymium slowly is oxidized, when heating flares up, forming Pr6O11 praseodymium oxide. Calcinating this oxide in the atmosphere of H or CH4, Pr2O3 oxide is formed. If to carry out oxidation of praseodymium in the atmosphere of O2 with a pressure of 10 MPas, PrO2 praseodymium dioxide is formed.

Praseodymium, as well as cerium, is inclined to show the valency 4+, in addition to the valency, normal for all lanthanides, 3+. At the same time praseodymium is very similar also to other next element - neodymium. Properties of the majority of compounds of trivalent praseodymium and trivalent neodymium are extremely close.

The prices of praseodymium approximately correspond to the prices of neodymium.
Use of praseodymium:
production of ceramics;
cooking of glass of pale green coloring (praseodymium oxide);
laser radiation;
electrovacuum engineering;
steel alloying.
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