英语词汇“didymium”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

didymium

/dɪˈdɪmɪəm

noun [mass noun] Chemistry

A mixture containing the rare earth elements praseodymium and neodymium, used to colour glass for optical filters. It was originally regarded as a single element.In 1879 Paul-Emile Lecoq, gallium's discoverer, announced that there was another element contaminating didymium, which he called samarium....

The discovery of praseodymium is credited to the Austrian chemist Carl Auer who found that a previously discovered element, didymium, was actually a mixture of two other new elements.
Didymia, and its supposed elemental associate, didymium, then vanished from the chemical pantheon.

Origin

Mid 19th century: from Greek didumos 'twin' (because it was closely associated with lanthanum) + -ium (used as a suffix for new metals).

单词	didymium
释义	didymium /dɪˈdɪmɪəm / noun [mass noun] Chemistry A mixture containing the rare earth elements praseodymium and neodymium, used to colour glass for optical filters. It was originally regarded as a single element.In 1879 Paul-Emile Lecoq, gallium's discoverer, announced that there was another element contaminating didymium, which he called samarium.... The discovery of praseodymium is credited to the Austrian chemist Carl Auer who found that a previously discovered element, didymium, was actually a mixture of two other new elements. Didymia, and its supposed elemental associate, didymium, then vanished from the chemical pantheon. Origin Mid 19th century: from Greek didumos 'twin' (because it was closely associated with lanthanum) + -ium (used as a suffix for new metals).
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