didymium


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didymium

[dī′dim·ē·əm]
(chemistry)
A mixture of the rare-earth elements praeseodymium and neodymium. Abbreviated Di.
References in periodicals archive ?
In bench-scale test work, we effectively optimized the cerium removal to 99% and also separated out the remaining light rare earths to make the recovery of both pure lanthanum and pure didymium products possible.
Conservation Unit / altitude Species Frei Caneca Pau Ferro Buraquinho Dois Irmaos 500-750 m 400-600 m 45 m 30-80 m Arcyria cinerea - - + + Didymium anellus - - - + Didymium iridis + + - - Didymium minus - + - - Physarum compressum + + + + Physarum didermoides - - - + Physarum melleum - - - + Physarum sulphureum - - - + Physarum sp.
A high purity didymium oxide (a neodymium/praseodymium oxide mix) product is scheduled in June, to be followed by lanthanum oxide and finally a cerium oxide product.
He named this new element didymium (Greek for "twin") because, as he said, it seemed to be "an inseparable twin brother of lanthanum" (Weeks, 1968).
The wavelength scale of the spectrophotometer was calibrated with a didymium filter (Hitachi) having sharp absorption bands at 403.
Sequential growth resulted from increased sales volume of lanthanum and didymium as well as a robust pricing environment across all products.
In April 2010, the new company will begin producing 800 tons a year in total of didymium and dysprosium, which will be used as raw material for neodymium-based high-performance magnetic alloys.
In the next few years, he isolated four other elements from the rare earth minerals: yttrium, erbium, terbium, and didymium.