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Topic: Magnetite

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  Magnetite: Magnetite mineral information and data.
Hematite overgrowths on, and inclusions in, magnetite; ilmenite inclusions, rutile overgrowths, chorite group overgrowths, pyrophanite inclusions; magnetite on hematite; inclusions in muscovite; inclusions in hematite; inclusions in ilmenite; magnetite overgrowths on olivine
Fleet, M.E., Bilcox, G.A., and Barnett, R.L. (1980) Oriented magnetite inclusions in pyroxenes from the Grenville province.
Coey, J.M.D., Berkowits, A.E., Balcells, L.I., Putris, F.F., and Parker, F.T. (1998) Magnetoresistance of magnetite.
www.mindat.org /min-2538.html   (968 words)

  Magnetite - LoveToKnow 1911
Magnetite is a mineral of wide distribution, occurring as grains in many massive and volcanic rocks, like granite, diorite and dolerite.
Grains of magnetite occur in serpentine, as an alteration-product of the olivine.
In emery, magnetite in a granular form is largely associated with the corundum; and in certain kinds of mica magnetite occurs as thin dendritic enclosures.
www.1911encyclopedia.org /Magnetite   (466 words)

FLORENCE COUNTY: Massive magnetite associated with stilpomelane is found with sideritic carbonate and pyritic chert on the dump from the Dunkel exploration shaft and adit in sec.
SAWYER COUNTY: Titaniferous magnetite is abundant in gabbro and troctolite in the Round Lake Intrusive east of Hayward (T.41N.
The magnetite occurs with olivine, plagioclase, augite and apatite (Stuhr and Cameron, 1976).
www.uwrf.edu /~wc01/magnetite.htm   (1085 words)

The Curie temperature of magnetite is about 580°C. Magnetite is the most magnetic of all the naturally occurring minerals on Earth, and these magnetic properties led to lodestone being used as an early form of magnetic compass.
Magnetite typically carries the dominant magnetic signature in rocks, and so it has been a critical tool in paleomagnetism, a science important in discovering and understanding plate tectonics.
Magnetite can be prepared in the laboratory as a ferrofluid in the Massart method by mixing iron(II) chloride and iron(III) chloride in the presence of sodium hydroxide.
www.reference.com /browse/wiki/Magnetite   (743 words)

 Magnetism on the Iron Range
Magnetite is composed of iron atoms in two different states, one atom with a
Since magnetite is strongly ferrimagnetic, ordinarily strong production magnets are sufficient to separate magnetite from a finely ground mixture of taconite ore, which includes magnetite and its host rock.
During this process, the magnetite is further oxidized to hematite and transforms from a strongly magnetic to a very weakly magnetic material.
www.tc.umn.edu /~smith213/ma.htm   (645 words)

At Franklin magnetite is found here and there, associated with or taking the place of franklinite in parts of the zinc-ore deposit, or forming lenses of granular iron ore, or in some places disseminated in limestone.
In the iron-ore bed underlying the zinc-ore deposit on its west side magnetite is the principal ore mineral, massive for the most part but in places crystallized on the walls of vugs.
Magnetite is a constituent of the pegmatite, at some places only in minute amount but at others in considerable abundance, giving the rock a dark color.
franklin-sterlinghill.com /palache/magnetite.stm   (331 words)

 MAGNETITE Chapter 22. Oxides and hydroxides
Magnetite occurs in great abundance at Franklin in the Furnace Magnetite Bed, which is discussed in detail in the section entiled “Regional and local geology of the Franklin-Sterling Hill area” and in the historical sections.
Magnetite is commonly found in minor amounts in some sulfide assemblages and similarly in the nickel-arsenide assemblage.
Magnetite is found in substantial amounts, associated with andradite, pyrite, and hedenbergite, in the iron mines on Balls Hill; these deposits supported the local iron industry.
franklin-sterlinghill.com /dunn/ch22/magnetite.stm   (572 words)

 Magnets & More   (Site not responding. Last check: )
This is an interesting issue because were magnetite to be present within an appropriately constructed and enervated sensory organ, the animal might potentially utilize such an organ to determine geographical directions relative to the magnetic poles, perhaps facilitating the navigation underlying long-distance animal migrations.
The mere presence of magnetite in tissues is not, of course, definitive evidence for the perception of the earth's magnetic field.
Magnetite is a natural occurring stone that is literally everywhere, because the Earth is a giant magnet.
www.amagnetaday.com /magnetite.htm   (6062 words)

 PSRD: ALH 84001 magnetite
The magnetite grains reside in tiny grains of iron-magnesium-calcium carbonates, which are typically 50-200 micrometers across and are dispersed throughout the ALH 84001 meteorite as disk-shaped or spheroidal grains, or, in the case of carbonates that enclose silicate fragments, as irregularly shaped grains.
Studies of thin slices of the rock show that the magnetites are found at the rims of carbonate grains in optically opaque regions and throughout the interior of the carbonate grains.
Magnetites in the optically-opaque rim are crowded together and appear to be more irregular in shape, consistent with growth in a highly strained carbonate crystal.
www.psrd.hawaii.edu /May02/ALH84001magnetite.html   (3575 words)

Magnetite is one of the most ubiquitous of all minerals, occurring in a wide variety of igneous, metamorphic, and sedimentary rocks.
Grains of magnetite are major constituents of the opaque and heavy miineral fractions in sand and silt of detrital sediments and soils.
Magnetite occurs in many soils inherited from the parent materials and is usually found in the sand and silt size fractions.
www.soils.wisc.edu /~barak/virtual_museum/magnetite/magnetite_tx.html   (525 words)

Like hematite, magnetite is an iron oxide mineral.
Magnetite is a rock forming mineral in certain igneous rocks and forms bands or lenses in metamorphic formations.
In the Pre-Cambrian banded iron formations the magnetite was deposited as a chemical sedimentary mineral.
www.museums.udel.edu /mineral/mineral_site/collection/alphabetical/M/magnetite.html   (41 words)

Magnetite is often not very abundant, but it can be found in many different types of igneous, metamorphic, and sedimentary rocks.
Magnetite can also be found in metamorphic rocks that formed from iron-rich sedimentary rocks.
Black sand grains at beaches and elsewhere are often made of magnetite.
www.windows.ucar.edu /tour/link=/earth/geology/min_magnetite.html   (255 words)

 Phelps Dodge: Magnetite
Magnetite is a fl-colored iron oxide mineral that is also a natural magnet.
Magnetite is a major component for manufacturing high-strength cement as well as used in fertilizers.
Magnetite is mined at our Cobre Mining Co. property in New Mexico, where it occurs as an important by-product of our copper-producing operations.
www.phelpsdodge.com /AboutUs/OurCompanies/Mining/MiningProducts/Magnetite.htm   (141 words)

 Nutritional Wellness | Magnetite (ci shi)
Magnetite is a mineral, a magnetic iron ore belonging to the spinelle family, which is comprised mainly of ferroferic oxide and tri-iton tetroxide.
Magnetite is available most often as a powder (finely ground) or a pill.
Magnetite powder is often used in infusions and decoctions.
www.nutritionalwellness.com /nutrition/herbs/m/magnetite.php   (451 words)

 MAGNETITE (Iron Oxide)
Magnetite is a natural magnet, hence the name, giving it a very nice distinguishing characteristic.
Magnetite is a member of the spinel group which has the standard formula A(B) The A and B represent usually different metal ions that occupy specific sites in the crystal structure.
In the case of magnetite, Fe, the A metal is Fe +2 and the B metal is Fe +3; two different metal ions in two specific sites.
mineral.galleries.com /minerals/oxides/magnetit/magnetit.htm   (236 words)

 Magnetite   (Site not responding. Last check: )
Magnetite is a mineral that has a very high iron content.
Magnetite, also known as lodestone, is found throughout the United States.
Magnetite is an important source of iron ore and occurs in many igneous rocks.
volcano.und.nodak.edu /vwdocs/vwlessons/lessons/Slideshow/Show1/Show1-5.html   (72 words)

 Magnetite -- from Eric Weisstein's World of Chemistry
Magnetite derives its dark color because of intervalence charge transfer.
Magnetite found in nature can be used to date lava flows with the aid of paleomagnetism.
Magnetite can be found in small quantities where the solid solution of ilmenite has occurred
scienceworld.wolfram.com /chemistry/Magnetite.html   (93 words)

 Double glazing, acoustic windows, noise reduction, sound proof windows - Magnetite Window Insulation
Magnetite uses magnets, similar to those used in a fridge door, to hold them closed.
Using a soft cloth or shamy the Magnetite panels can be easily cleaned with an acrylic cleaner or a mild detergent (3% in luke warm water).
Magnetite's slim line framing and color range means that it blends into your existing window.
www.magnetite.com.au /faq.asp?cID=1   (320 words)

 Magnetite: Minfax   (Site not responding. Last check: )
Fe Magnetite is an oxide of iron which occurs in igneous rocks, and in veins and replacement deposits; it is one of the most important ores of iron.
Magnetite is permenantly magnetic, and was the first magnetic material to be discovered, known then as lodestone.
A magnet will stick to magnetite, with some samples being sufficiently strongly magnetic to attract iron filings or, as shown here, staples.
www.minersoc.org /pages/education/dragons_cave/magnetite/magnetite.html   (84 words)

Magnetite is a member of the spinel group which has the standard formula A(B)2O4.
Keep the bits in mind about bar-shaped lumps of magnetite in tissue between the eyes of the birds, and about humans possessing this same sensitivity towards the magnetic field, as you read this section of the Cs transcripts.
The crucible is the brain, and the magnetite is heated by the electricity that is generated by our neurons when we are challenged by a thought or series of thoughts that are the Truth/Objective Knowledge as opposed to subjective assumptions.
www.quantumfuture.net /qfs/qfs_magnetite.htm   (6136 words)

 Highbeam Encyclopedia - Search Results for magnetite   (Site not responding. Last check: )
Its chief ores are hematite (Fe 2 O 3), magnetite (Fe 3 O 4), and iron pyrites (FeS 2).
Magnetite adds weight and more to plastics and rubbers.
Occurrence of magnetite in the sand fraction of an Oxisol in the Brazilian savanna ecosystem, developed from a magnetite-free lithology.
www.encyclopedia.com /SearchResults.aspx?Q=magnetite&StartAt=11   (753 words)

 Canada Science and Technology Museum   (Site not responding. Last check: )
Magnetite is found in rock strata associated with iron deposits and has been found in the ocean floor dating from 2 to 55 million years old.
Magnetite is magnetic because its molecular structure has allowed it to retain the alignment of particles caused by the Earth's magnetic field during its formation millions of years ago.
A piece of magnetite, or a bar magnet, when freely suspended, generally comes to rest pointing in a north-south direction (a compass needle is a magnet).
www.sciencetech.technomuses.ca /english/schoolzone/Info_Magnets.cfm   (1654 words)

Magnetite is a mineral that is formed in metamorphic, igneous, and sedimentary rocks.
Magnetite is used to make steel, magnets, paints, ink, paper, and cosmetics.
Superstitious people believed that Magnetite gives a person more energy and takes away fear and bad feelings.
library.thinkquest.org /05aug/00461/magnetite.htm   (142 words)

 Scientists Find Evidence of Ancient Microbial Life on Mars
The researchers found that the magnetite crystals embedded in the meteorite are arranged in long chains, which they say could have been formed only by once-living organisms.
Magnetite is an iron oxide, similar to iron rust.
The researchers say the magnetite chains probably were flushed into microscopic cracks inside the martian rock after it was shattered by an asteroid impact approximately 3.9 billion years ago.
www.spacedaily.com /news/mars-life-01b.html   (816 words)

 READE Advanced Materials - Magnetite / Black Iron Oxide Powder (Fe3O4)   (Site not responding. Last check: )
Magnetite is the most magnetic of all the minerals on Earth.
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 magnetite is carried to the beach via rivers from erosion and is concentrated via wave action and currents.
www.reade.com /Products/Oxides/Magnetite--Black-Iron-Oxide-Powder-(Fe3O4).html   (559 words)

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