Search results
Jean Charles Galissard de Marignac (24 April 1817 – 15 April 1894) was a Swiss chemist whose work with atomic weights suggested the possibility of isotopes and the packing fraction of nuclei. His study of the rare earth elements led to his discovery of ytterbium in 1878 and co-discovery of gadolinium in 1880. [1] [2] [3]
Marignac’s name is well known for the careful and exact determinations of atomic weights which he carried out for twenty-eight of the elements. In undertaking this work he had, like J. S. Stas, the purpose of testing Prout’s hypothesis, but he remained more disposed than the Belgian chemist to consider the possibility that it may have some ...
JEAN CHARLES GALISSARD DE MARIGNAC (1817-1894), Swiss chemist, was born at Geneva on the 24th of April 1817. When sixteen years old he began to attend the Ecole Polytechnique in Paris, and from 1837 to 1839 studied at the Ecole des Mines.
His ytterbia was in fact impure, for L. F. Nilson was able to extract scandia from it in 1879; and in 1907 Urbain separated in into (neo)ytterbia and lutecia (now called lutetia). In 1880 Marignac isolated white and yellow oxides from samarskite, which he uncommittdly labeled Yα and Yβ (samaria).
Achievements. Marignac is usually regarded as the discoverer of Ytterbium and gadolinium. In general, his separations were a strategic and indispensable part of chemistry success in understanding the elements of the rare-earth series.
Definition of Marignac in the Definitions.net dictionary. Meaning of Marignac. What does Marignac mean? Information and translations of Marignac in the most comprehensive dictionary definitions resource on the web.
Marignac's personal life seems to have been singularly uneventful. Sprung from a French family which had settled in Geneva early in the eighteenth century, he was born in that city in 1817.
