1) Iron mineral 2) Mineral 3) Oxide mineral 4) Trigonal mineral
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https://www.crosswordclues.com/clue/ilmenite
Ilmenite is the titanium-iron oxide mineral with the idealized formula {Chem|Fe||Ti||O|3}. It is a weakly magnetic black or steel-gray solid. From the commercial perspective, ilmenite is the most important ore of titanium. == Structure and properties == Ilmenite crystallizes in the trigonal system. The ilmenite crystal structure consists of an ord...
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http://en.wikipedia.org/wiki/Ilmenite
iron-black, heavy, metallic oxide mineral, composed of iron and titanium oxide (FeTiO3), that is used as the major source of titanium. It forms ...
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http://www.britannica.com/eb/a-z/i/9
A gray or black, weakly magnetic mineral found in basic igneous rocks, notably basalt, and metamorphic rocks. Ilmenite is nearly pure iron (II) titanium (IV) oxide (FeTiO
3); it occurs as tabular to fine, scaly crystals in the rhombohedral system, and as compact masses or granu...
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http://www.daviddarling.info/encyclopedia/I/ilmenite.html
Il'men·ite noun [ So called from
Ilmen , a branch of the Ural Mountains.]
(Min.) Titanic iron. See
Menaccanite .
Found on
http://www.encyclo.co.uk/webster/I/10
Ilmenite or titaniferous iron oxide is an iron-black or steel-grey coloured common rock-forming mineral which is chiefly found in small crystals in basic igneous rocks and schists, consisting chiefly of the oxides of iron and titanium. It has weak magnetism and a relative hardness of six. It is the major ore of titanium. It is also known as menacca...
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http://www.probertencyclopaedia.com/browse/HI.HTM
A weakly magnetic crystalline iron titanium oxide mineral (FeTiO3) which is iron-black or steel-gray.
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http://www.scientificpsychic.com/etc/geology-glossary.html
[
n] - a weakly magnetic black mineral found in metamorphic and plutonic rocks
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http://www.webdictionary.co.uk/definition.php?query=ilmenite
An ore mineral of titanium, being an iron-titanium oxide.
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https://www.encyclo.co.uk/local/22734
(Iron Titanium Oxide) Ilmenite is an economically important and interesting mineral. It is named for its place of discovery (such places are called
type localities) at Ilmen Lake in the Ilmen Mountains, Miask in the southern portion of the Ural Mountains of Russia. Ilmenite forms as a primary mineral in maf...
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https://www.encyclo.co.uk/local/23719
a very common black mineral, iron titanate, FeTiO, occurring in crystals but more commonly massive.
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https://www.infoplease.com/dictionary/ilmenite
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