单词 | niobian |
释义 | niobian, a. Min.|naɪˈəʊbɪən| [f. niobium + -ian 2.] Of a mineral: having a (small) proportion of a constituent element replaced by niobium.
1962[see ilmenorutile]. 1972Nature 31 Mar. 215/1 Terrestrial dysanalyte is a niobian perovskite which contains about 26% CaO and no detectable ZrO2. |

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