Which element is named after the Finnish chemist Johan Gadolin?

Gadolinium is the element named after Finnish chemist Johan Gadolin.

Gadolinium has the symbol Gd and atomic number 64. Its name honors Johan Gadolin, a Finnish chemist, physicist, and mineralogist who studied a mineral from Ytterby, Sweden, in 1794. That mineral was later named gadolinite in his honor, and the element name gadolinium ultimately derives from the same connection.

The element’s history unfolded gradually. In 1880, Swiss chemist Jean Charles Galissard de Marignac detected the characteristic spectral lines of gadolinium in mineral samples and separated an oxide associated with the new element. Paul-Émile Lecoq de Boisbaudran proposed the name gadolinium in 1886, while the pure element was not isolated until 1935.

Gadolin did not discover pure gadolinium itself; his earlier analysis helped open the study of the rare-earth minerals from which it was later identified. This distinction is a common source of confusion. Gadolinium is a silvery lanthanide used in specialized magnets, phosphors, and some MRI contrast agents. Its compounds can strongly affect magnetic behavior, making the element valuable in both research and technology.