magnetite

Definitions

  • WordNet 3.6
    • n magnetite an oxide of iron that is strongly attracted by magnets
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Webster's Revised Unabridged Dictionary
    • n Magnetite (Min) An oxide of iron (Fe3O4) occurring in isometric crystals, also massive, of a black color and metallic luster. It is readily attracted by a magnet and sometimes possesses polarity, being then called loadstone. It is an important iron ore. Called also magnetic iron.
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Century Dictionary and Cyclopedia
    • n magnetite Magnetic oxid of iron; a black oxid of iron (Fe3O4 or FeO.Fe2O3) which is strongly attractable by a magnet. It sometimes possesses polarity, and is then called lodestone. It occurs in isometric crystals, generally octahedrons or dodecahedrons, and also more commonly massive in beds in the older crystalline rocks; in the form of scattered grains or crystals it is a common constituent of many igneous rocks. It is an important ore of iron, and occurs in large quantities in Norway and Sweden, in the Adirondack and West Point regions of New York, and in New Jersey. Titaniferous magnetite is a variety containing some titanium.
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Usage

In literature:

The magnetite is a conductor of electricity which is easily vaporized.
"Artificial Light" by M. Luckiesh
This gentleman kindly gave me some good specimens of magnetite, greenockite (sulphate of cadmium), aurichalcite, Ludwigite, and garnet.
"Round About the Carpathians" by Andrew F. Crosse
The magnetites furnish about one-sixteenth of the output of the United States.
"Commercial Geography" by Jacques W. Redway
The titaniferous magnetites constitute a widely distributed but at present commercially unavailable class of iron ores.
"The Economic Aspect of Geology" by C. K. Leith
Magnetite is always present.
"Volcanoes: Past and Present" by Edward Hull
It exists as small specks in the centre of grains of magnetite.
"The Galaxy, April, 1877" by Various
Other minerals, except apatite, zircon and magnetite, are typically absent.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3" by Various
Many of these contain small quantities of chromium and nickel, and are associated with soapstone, potstone, dolomite, and magnetite.
"Asbestos" by Robert H. Jones
Other iron oxides, like haematite and limonite, may be present as alteration-products of the magnetite.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3" by Various
Deposits of iron ore accumulated in the several ways referred to above may be metamorphosed and changed to hematite and magnetite.
"North America" by Israel C. Russell
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In news:

Magnetite inclusion in a cell HERVE CADIOU, UNIVERSITY OF CAMBRIDGE.
Monoclonal anibodies bound to polystyrene microspheres containing magnetite have been used to remove tumour cells from bone marrow destined for autologous transplantation.
Monoclonal anibodies bound to polystyrene microspheres containing magnetite have been used to remove tumour cells from bone marrow destined for autologous transplantation.
Most domhigh pressure grinding mill for magnetite ore beneficiationestic talc is mined from open-pit operations.
Some dark areas can be seen, but the dark sands are rich in magnetite, an oxide of iron, exposed when the wind churns and sifts the sands .
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In science:

This also is of the same order of magnitude ∼ 10mT, seen for magnetite-based ferrofluids (Odenbach 2004).
Magnetism, FeS colloids, and Origins of Life
Kirschvink JL, Kobayashi-Kirschvink A, Diaz-Ricci JC et al (1992) Magnetite in human tissues: a mechanism for the biological effects of weak ELF magnetic fields.
Magnetism, FeS colloids, and Origins of Life
Wright et. al, Charge ordered structure of magnetite Fe3O4 below the Verwey transition, Phys.
First Principles Studies of Multiferroic Materials
Radaelli, Long Range Charge Ordering in Magnetite Below the Verwey Transition, Phys.
First Principles Studies of Multiferroic Materials
Marin, Lowtemperature structure of magnetite studied using resonant x-ray scattering, Phys.
First Principles Studies of Multiferroic Materials
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