Definitions
from The Century Dictionary.
- noun A radioactive substance separated from pitchblende by Giesel. It was at first believed to be a distinct element, but was afterward shown to be identical with the actinium of Debierne (see
actinium , 2).
Etymologies
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Examples
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In France, Debierne had discovered actinium and Giesel claimed to have found a different element, emanium.
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With Ramsay's consent, Hahn had taken with him the radiothorium he separated from samples of barium chloride and the actinium that he and a collaborator had earlier proved to be identical to the new element that the German chemist Friedrich Giesel had named emanium.
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And it is not inconceivable that the still more unstable emanation from the matter named actinium by Debierne and emanium by Giesel may be found to possess an even higher atomic weight than uranium; judging by the phenomenon of brilliant illumination when a preparation of emanium is held above a screen of zinc sulphide, the impression is formed that a very dense matter is falling down on the screen.
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