noun
ilmenite
A black iron-titanium oxide mineral (FeTiO₃), the most important ore of titanium. Used in geology, mining, and materials science.
イルメナイトはチタンの主要な鉱石です。
Ilmenite is the primary ore of titanium.
Rutile, another titanium dioxide mineral, but with a different crystal structure and higher TiO₂ content.
From English 'ilmenite', named after the Ilmen Mountains in Russia where it was first discovered.