columbic

[kuh-luhm-bik]

adjective

Chemistry.

1. niobic.

columbic

/ kəˈlʌmbɪk /

adjective

1. another word for niobic

Word History and Origins

Origin of columbic¹

First recorded in 1800–10; columb(ium) + -ic

Example Sentences

Colum′bate, a salt or compound of columbic acid with a base; Colum′bite, the native ore of columbium; Colum′bium, a metallic element now called niobium.

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Columbium oxychloride, CbOCl3, is formed when carbon tetrachloride, and columbic acid are heated together at 440� C.: 3CCl4 + Cb2O5 = 2CbOCl3 + 3COCl2, and also by distilling the pentachloride, in a current of carbon dioxide, over ignited columbic acid.

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Niobic acid is in its properties similar to columbic acid.

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When heated in the air it is oxidized into columbic acid, and is only soluble in hydrofluoric acid, yielding hydrogen.

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It melts with microcosmic salt quite readily in both of the flames, to a clear bead, which appears, if a considerable quantity of columbic acid be present, of a yellow color while hot, but colorless when cold, and does not become clouded if the intermittent flame be applied to it.

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