Skip to main content

ilmenite

ilmenite Mineral, FeTiO3; sp. gr. 4.5–5.0; hardness 5–6; trigonal; black; black to brownish-red streak; sub-metallic lustre; crystals normally thick and tabular, but often massive and compact; no cleavage; magnetic; occurs as an accessory mineral in igneous rocks, e.g. gabbro and diorite, in quartz veins and pegmatites, in gneisses, in association with hematite and chalcopyrite, and because it is resistant to weathering it occurs extensively in alluvial deposits with magnetite, monazite, and rutile. It is used as a source of iron and titanium. The name is derived from that of the Ilmen Mountains, Russia.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"ilmenite." A Dictionary of Earth Sciences. . Encyclopedia.com. 30 Apr. 2017 <http://www.encyclopedia.com>.

"ilmenite." A Dictionary of Earth Sciences. . Encyclopedia.com. (April 30, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/ilmenite

"ilmenite." A Dictionary of Earth Sciences. . Retrieved April 30, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/ilmenite

ilmenite

ilmenite (Ĭl´mĕnīt), black mineral, iron titanium oxide, FeTiO3, crystallizing in the hexagonal system. It is sometimes found as tabular hexagonal crystals but occurs more commonly as small grains in igneous and metamorphic rocks and in sands derived from them. Ilmenite has been noted as an important constituent of lunar rocks. It is the commonest titanium mineral and is the most important source of this element and its compounds. Over 3 million tons of ilmenite are mined annually; important producers are the United States, Canada, Australia, and Norway.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"ilmenite." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 30 Apr. 2017 <http://www.encyclopedia.com>.

"ilmenite." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (April 30, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/ilmenite

"ilmenite." The Columbia Encyclopedia, 6th ed.. . Retrieved April 30, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/ilmenite