单词 | ilmenite |
释义 | Word Frequency ilmenite(ˈɪlmɪˌnaɪt) noun a black mineral found in igneous rocks as layered deposits and in veins. It is the chief source of titanium. Composition: iron titanium oxide. Formula: FeTiO3. Crystal structure: hexagonal (rhombohedral) Word origin C19: from Ilmen, mountain range in the southern Urals, Russia, + -ite1 |
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