| 释义 |
lutetium Chem.|l(j)uːˈtiːʃɪəm, -sɪəm|
Also lutecium.
[ad. F. lutécium (G. Urbain 1907, in Compt. Rend. CXLV. 761), f. F. Lutèce, L. Lutēt-ia (see Lutetian a.): see -ium.]
A rare metallic element that is the heaviest member of the lanthanide series and forms colourless salts in which it is trivalent. Atomic number 71; symbol Lu.
1907Jrnl. Chem. Soc. XCII. ii. 956 (heading) A new element: lutecium, resulting from the decomposition of Marignac's ytterbium. 1929Encycl. Brit. XIV. 490/2 Lutecium occurs along with ytterbium, erbium, etc., in the minerals gadolinite, euxenite, xenotime, etc. It is separated from the other members of the group by the fractional crystallization of the bromates, lutecium bromate being the most soluble passes into the mother-liquor. 1939Physical Rev. LVI. 21 The half-life of the natural radioactivity of lutecium..is..7·3{pm}2 × 1010 years for Lu176, which probably is the active isotope. 1952Chem. & Engin. News 7 July 2843/2 The table of international atomic weights, as published by the ‘Comptes Rendus’ of the New York meeting of the Union for 1951..shows changes in the weights of seven elements... Lutetium replaces lutecium, to agree with the original Latin spelling Lutetia..instead of the French Lutèce. 1973J. J. Lagowski Mod. Inorg. Chem. xvi. 604 Lutetium, the first element which follows the lanthanides, starts the last d-series, but it forms a M3+ cation with a filled 4f orbital. Thus, lutetium on the basis of its atomic and ionic radii also appears to be a member of the lanthanide series. |