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Jean Charles Galissard De Marignac

Picture of Jean Charles Galissard De Marignac

Date of Birth: 04/24/1817

Age: 199

Place of birth: Geneva

Citizenship: Switzerland

Background

He graduated in 1839, the Paris Higher Mining School; Professor, University of Geneva (1841-78).

In 1866-1877 gg. he led a fierce controversy with Saxon chemist Joseph R. Hermann, which denied the existence of ilmenite supposedly open German; most discussed element is now known as technetium.

work

Prout`s hypothesis checking, defined in the 1842-83 atomic weights of 29 elements. In 1866 he developed a method of separation of niobium and tantalum. In 1878 he opened the ytterbium oxide, and in 1880 - a rare earth element oxide is unknown, later named (1886) of gadolinium oxide (see lanthanides.).