The native ore of columbium, a black columbate of iron and manganese; niobite.
| 单词 | θ6756 |
| 释义 | the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > oxides of titanium, tantalum, nickel, or rare earths > columbite or niobite (4) columbite1805 The native ore of columbium, a black columbate of iron and manganese; niobite. torrelite1836 Obsolete syn. of columbite, n. niobite1854 Mineralogy. = columbite, n. Subcategories:— yttrocolumbite (1) |
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