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8 results for: Magnetite

Dictionary Entries (5 more entries. View all »)
Dictionary.com Unabridged (v 1.1)Cite This Source
mag·net·ite    Audio Help   [mag-ni-tahyt] Pronunciation Key
–noun
a very common black iron oxide mineral, Fe3O4, that is strongly attracted by magnets: an important iron ore.
[Origin: 1850–55; magnet + -ite1; cf. G Magnetit]
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopedia Articles (1 more entry. View all »)
Columbia Electronic EncyclopediaCite This Source


magnetite, lustrous black, magnetic mineral, Fe3O4. It occurs in crystals of the cubic system, in masses, and as a loose sand. It is one of the important ores of iron (magnetic iron ore) and is a common constituent of igneous and metamorphic rocks. It is found in Norway, Sweden, the Urals, and various parts of the United States. A variety of magnetite, lodestone (or loadstone) exhibits polarity and is especially interesting for its natural magnetism; Magnet Cove, Ark., became famous as a source. 
The Columbia Electronic Encyclopedia Copyright © 2004, Columbia University Press.
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