Marignac, Jean Charles Galissard de

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Marignac, Jean Charles Galissard de


Born Apr. 24, 1817, in Geneva; died there Apr. 16, 1894. Swiss chemist. Member of the Paris Academy of Sciences (1886).

Marignac graduated from the School of Mines in Paris in 1839. He held a professorship at the University of Geneva from 1841 to 1878. Between 1842 and 1883, Marignac determined the atomic weights of 29 elements, thereby verifying Prout’s hypothesis. In 1866 he developed a method of separating niobium and tantalum. He discovered ytterbium oxide in 1878, and in 1880, the oxide of an unknown rare-earth element (named gadolinium oxide in 1886).


Oeuvres complètes vos, 1-2. Geneva, 1902-03. (Contains a biography and bibliography of works by Marignac.)
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.