- a very common black mineral, iron titanate, FeTiO3, occurring in crystals but more commonly massive.
Origin of ilmenite
1820–30; after the Ilmen Mountains (Russian Ilʾménskie góry) in the southern Urals, where it was first identified; see -ite1
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Examples from the Web for ilmenite
Ilmenite has a black streak; it is opaque, but in very thin scales sometimes transparent with a clove-brown colour.
The principal titanium minerals are rutile (titanium oxide) and ilmenite (iron titanate).
Rutile and ilmenite both have high specific gravity and are little affected by weathering.
Among the accessory minerals may be mentioned apatite, magnetite, ilmenite, picotite and garnet.
Ilmenite has sometimes been mistaken in the South African mines for carbonado.
- 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: FeTiO 3 . Crystal structure: hexagonal (rhombohedral)
C19: from Ilmen, mountain range in the southern Urals, Russia, + -ite 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- A lustrous black to brownish rhombohedral mineral that is an ore of titanium. Ilmenite occurs in igneous rocks and is one of the principal dark minerals observed in beach sands. Chemical formula: FeTiO3.
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