| 释义 |
rhenium Chem.|ˈriːnɪəm|
[mod.L., coined in Ger. (W. Noddack et al. 1925, in Sitzungsber. d. Preuss. Akad. d. Wissensch. 409), f. Rhēn-us, L. form of the name of the river Rhine: see -ium.]
A very dense, refractory, rare metallic element belonging to the manganese group, resembling platinum in appearance, and obtained in small quantities from molybdenite ores. Symbol Re; atomic number 75.
1925[see masurium]. 1938R. W. Lawson tr. Hevesy & Paneth's Man. Radioactivity (ed. 2) xvi. 160 In the case of the element 75 (rhenium), the regularities in the periodic classification..allowed definite predictions on the chemical nature of the missing substance to be made, so that the element could be looked for with success. 1950N. V. Sidgwick Chem. Elements II. 1291 Such sulphides as molybdenite (MoS2) may contain as much as 1, and in two cases as much as 10 and 21 parts of rhenium per million. 1961New Scientist 30 Nov. 557/3 The resistance to corrosion offered by rhenium metal has for long been appreciated by industry and its special properties have frequently been put to good use. 1963I. L. Finar Org. Chem. (ed. 4) I. xii. 276 Both rhenium heptaselenide and heptasulphide are good catalysts for hydrogenation. 1971World Petroleum June 193/1 This catalyst, containing platinum and rhenium, exhibited such exceptional stability characteristics that it was possible to employ it at substantially lower operating pressures, so that marked increases in yields of motor fuel of a given octane rating, of hydrogen and of aromatics were obtainable. 1973R. D. Peacock in J. C. Bailar et al. Comprehensive Inorg. Chem. III. xxxix. 905 Rhenium, the dvi-manganese of Mendeléev, and the least abundant of the natural chemical elements, was the last..to be identified by conventional chemical methods. Ibid. 938 Rhenium forms three anhydrous oxides: the dioxide, the trioxide and the heptaoxide. |