cassiopeium การใช้

The Germans were reluctant to relinquish naming rights to the French, often calling it " cassiopeium ".
The favorite one is Cassiopeium and Aldebaranium are no elements because the French chemist was heading the naming committee and not the Austrian chemist.
The Austrian chemist Carl Auer von Welsbach independently isolated these elements from ytterbia at about the same time, but he called them aldebaranium and cassiopeium; Urbain and Welsbach accused each other of publishing results based on the other party.
The later discrediting of Urbain's work on element 72 led to a reappraisal of Welsbach's work on element 71, so that the element was renamed to " cassiopeium " in German-speaking countries for some time.
In 1909, the priority was finally granted to Urbain and his names were adopted as official ones; however, the name "'cassiopeium "'( or later "'cassiopium "') for element 71 proposed by Welsbach was used by many German scientists until the 1950s.