Rare Earths
In 1885 von Welsbach used a method he developed himself to separate didymium for the first time. He saw several different colored versions which he named "praseodymium" (green) and "neodidymium" (pink); the latter then became the more common name for the element, neodymium.
Read more about this topic: Carl Auer Von Welsbach
Famous quotes containing the word rare:
“Though Americans talk a good deal about the virtue of being serious, they generally prefer people who are solemn over people who are serious. In politics, the rare candidate who is serious, like Adlai Stevenson, is easily overwhelmed by one who is solemn, like General Eisenhower. This is probably because it is hard for most people to recognize seriousness, which is rare, especially in politics, but comfortable to endorse solemnity, which is as commonplace as jogging.”
—Russell Baker (b. 1925)