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praseodymium

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praseodymium

Silver-white, malleable, metallic element of the lanthanide series, atomic number 59, relative atomic mass 140.907. It occurs in nature in the minerals monzanite and bastnaesite, and its green salts are used to colour glass and ceramics. It was named in 1885 by Austrian chemist Carl von Welsbach.

He fractionated it from dydymium (originally thought to be an element but actually a mixture of rare-earth metals consisting largely of neodymium, praseodymium, and cerium) and named it for its green salts and spectroscopic line.
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China supplies at least 95 percent of the world's rare earths -- 17 chemical elements with hard-to-pronounce names such as praseodymium and yttrium -- essential for a wide range of high-tech devices and green technologies.
China corners rare earths market by AFP / AFP Asian Edition
China supplies at least 95 percent of the world's rare earths -- 17 chemical elements with hard-to-pronounce names such as praseodymium and yttrium -- essential for a wide range of high-tech devices and green technologies.
China corners rare earths market by AFP / AFP Global Edition
They’re generally clustered in a separate grouping at the bottom of the table, are known collectively as the lanthanoids, and these are their names, in order of atomic number (57-70): lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, and ytterbium.
Why all the fuss over rare earths? by Doug Hornig / Stockhouse
 
 
 
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