| 释义 |
columbium Chem.|kəˈlʌmbɪəm|
[f. Columbia poet. name for America + -ium. So named in 1801 by Hatchett, who discovered it in a specimen of the ore (columbite) brought from Massachusetts.]
A metallic element, occurring in columbite and other minerals. Symbol Cb. Now called niobium.
1801Hatchett in Phil. Trans. XLII. 65 A Metal hitherto unknown..Having consulted with several of the..chemists of this country, I have been induced to give it the name of Columbium. 1862Dana Man. Geol. 139 There are a number of rare ores of..columbium among the Swedish azoic rocks. 1863–77Watts Dict. Chem. IV. 49 This metal..ought perhaps, in justice to its discoverer, to retain the name columbium which he gave to it; but as the rediscovery of the metal is certainly due to Rose, chemists are, for the most part, agreed to designate it by the name which he assigned to it, namely niobium. |