columbiumn.
/kəˈlʌmbɪəm/, U.S. /kəˈləmbiəm/ Chemistry.
A metallic element, occurring in columbite and other minerals. Symbol Cb. Now called niobium.
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columbium1801
niobium1845
1801 Hatchett in Philos. Trans. (Royal Soc.) 42 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.
1863 J. D. Dana Man. Geol. 139 There are a number of rare ores of..columbium among the Swedish azoic rocks.
1863–77 H. Watts 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.
This entry has not yet been fully updated (first published 1891; most recently modified version published online March 2022).
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