In 1907, French chemist Georges Urbain demonstrates …
Years: 1908 - 1908
In 1907, French chemist Georges Urbain demonstrates that Marignac's earth is composed of two oxides, which Urbain calls lutecia and neoytterbia.
Around the same time, Austrian chemist Carl Auer von Welsbach independently discovers these elements and calls them cassiopeium and aldebaranium.
Urbain describes a process for separating lutecia from Marignac's ytterbia, and is credited with the discovery of a new element, which he names lutetium after Latin Lutetia, the ancient Roman name for his native city of Paris.
Austrian chemist and engineer Carl Auer von Welsbach, working independently, discovers the same element in 1908, and calls it cassiopeium.
The name lutetium becomes widely accepted, except in Germany, where it is commonly called cassiopeium until the 1950s.
