| 单词 | columbite |
| 释义 | columbite /keuh lum"buyt/, n. a black, crystalline mineral, iron niobate, (Fe, Mn)Nb2O6, the principal ore of niobium, an end member of a series of solid solutions in which manganese and tantalum combine to form tantalite. [1795-1805; COLUMB(IUM) + -ITE1] |
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