Marignac sentence example
- In 1878 Marignac, having subjected Mosander's erbia, obtained from gadolinite, to a careful examination, announced the presence of a new element, ytterbium; this discovery was confirmed by Nilson, who in the following year discovered another element, scandium, in Marignac's ytterbia.
- In 1880 Marignac examined certain earths obtained from the mineral samarksite, which had already in 1878 received attention from Delafontaine and later from Lecoq de Boisbaudran.
- Nitrogen forms approximately 79% by volume (or 77% by weight) of the atmosphere; actual values are:% by volume-79.07 (Regnault), 79.20 (Dumas);% by weight76.87 (Regnault), 77.00 (Dumas), 77.002 (Lewy), 76.900 (Stas), 77.010 (Marignac).
- 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.
- Cleve, printed in the Journal of the London Chemical Society for 1895, contains a list of Marignac's papers.Advertisement
- The latent heat of vaporization of mercury was found by Marignac to be 103 to 106.
- Blomstrand, and others, especially of Marignac, proved the identity of columbium, dianium and niobium, and that ilmenium was a mixture of columbium and tantalum.
- Among the scientific celebrities were de Saussure, the most many-sided of all; de Candolle and Boissier, the botanists; Alphonse Favre and Necker, the geologists; Marignac, the chemist; Deluc, the physicist, and Plantamour, the astronomer.
- Stas, from the analysis of pure silver iodate, and by C. Marignac from the determinations of the ratios of silver to iodine, and of silver iodide to iodine; the mean value obtained for the atomic weight being 126.53.
- C. Marignac has prepared it by the action of calcium carbonate on magnesium chloride.Advertisement
- Stas, from the synthesis of silver chloride, obtained the value 35.457 (O =16), and C. Marignac found the value 34.462.
- Phthalic acid was obtained by Laurent in 1836 by oxidizing naphthalene tetrachloride, and, believing it to be a naphthalene derivative, he named it naphthalenic acid; Marignac determined its formula and showed Laurent's supposition to be incorrect, upon which Laurent gave it its present name.