Sentence examples for praseodymium from inspiring English sources

By using such exotic materials as yttrium orthosilicate crystals and praseodymium ions it trapped photons in bunches of as many as 500 at a time.

The Bayan Obo deposit is slightly richer in praseodymium and neodymium than the Mountain Pass bastnasite is, primarily at the expense of the lanthanum content, which is 10 percent greater in the Mountain Pass ore.

The Sichuan ore has more lanthanum, less praseodymium and neodymium, and about the same amount of cerium as the Bayan Obo deposit.

CeO2 (where Ce is tetravalent) is the normal stable oxide form, while the oxides of praseodymium and terbium have the Pr6O11 and Tb4O7 stoichiometries containing both the tetra- and the trivalent states i.e., 4PrO2∙Pr2O3 and 2TbO2∙Tb2O3, respectively.

The alloying of rare-earth metals, in particular samarium and praseodymium, with 60 65 percent cobalt results in a range of high-coercivity, fine-powder magnets.

The only tetrahalides known are the RF4 phases, where R = cerium, praseodymium, and terbium.

The low concentrations of cerium and praseodymium in both clays, especially in the Xunwu clay, compared with the normal rare-earth distribution in the other minerals, is also remarkable.

Misch metal is a mixture of the rare-earth elements that has been reduced from a rare-earth concentrate in which the rare-earth content is the same as in the mined ores (i.e., generally about 50 percent cerium, 25 percent lanthanum, 18 percent neodymium, and 7 percent praseodymium).

As the 4f electrons are added when one moves across the lanthanide series from lanthanum to cerium to praseodymium and so on, the electrons, which have a magnetic moment due to the electron's spin, maintain the same spin direction and the moments are aligned parallel with one another until the 4f level is half-filled i.e., at seven 4f electrons in gadolinium.

Austrian chemist Carl Auer von Welsbach discovered neodymium in 1885 by separating ammonium didymium nitrate prepared from didymia (a mixture of rare-earth oxides) into a neodymium fraction and a praseodymium fraction by repeated crystallization.

By repeated beta decay, the barium-144 in turn is converted step by step to other fission products, lanthanum-144, cerium-144, praseodymium-144, and eventually relatively stable neodymium-144; and krypton-89 is similarly transformed to stable yttrium-89 by way of rubidium-89 and strontium-89.