{| border=1 cellspacing=0 align=right cellpadding=0 width=250 valign=top style="margin-left:1em" |----- align=center bgcolor="#9966FF" !colspan=2 align=center|Magnetite |----- align=center !colspan=2| Magnetite from the Kola Peninsula, Russia |----- align=center bgcolor="#9966FF" !colspan=2|General |----- |Category||Mineral |----- |Chemical formula|| iron(II),(III) oxide Fe3O4 |----- align="center" bgcolor="#9966FF" !colspan=2|Identification |----- | Colour || Black, greyish |----- | Crystal habit || Octahedral, fine granular to massive, |----- | Crystal structure || Isometric |----- | Cleavage|| Indistinct |----- | Fracture|| Uneven |----- | Mohs Scale hardness || 5.5 - 6.5 |----- | Luster|| Metallic |----- | Refractive index|| Opaque |----- | Pleochroism|| None |----- | Streak|| Black |----- | Specific gravity|| 5.17 - 5.18 |----- | Fusibility|| ? |----- | Solubility|| ? |----- align="center" bgcolor="#9966FF" !colspan=2|Major varieties |----- | Lodestone|| Magnetic and definitely with north and south poles |----- |} Magnetite is a magnetic mineral form of both iron(II) oxide and iron(III) oxide or (iron(II,III) oxide), with chemical formula , one of several iron oxides and a member of the spinel group. Magnetite is the most magnetic of all the minerals on Earth, and these magnetic properties led to lodestone being used as an early form of magnetic compass. Small grains of magnetite occur in almost all igneous rocks and metamorphic rocks as well as many sedimentary rocks. Magnetite is a valuable source of iron ore. It dissolves slowly in hydrochloric acid. Large deposits of magnetite are found in Kiruna, Sweden, and in the Adirondack Mountains region of New York in the United States. Deposits are also found in Norway, Germany, Italy, Switzerland, South Africa, India, Mexico, and in Oregon, New Jersey, Pennsylvania, North Carolina, Virginia, New Mexico, Utah, and Colorado in the United States. Magnetite is sometimes found in large quantities in beach sand. Such mineral sands or iron sands or black sands are found in various places such as California and the west coast of New Zealand. The magnetite is carried to the beach via rivers from erosion and is concentrated via wave action and currents. Crystals of magnetite have been found in some bacterium (e.g., Aquaspirillum magnetotacticum) and in the brains of bees, of termites, of some birds (e.g., the pigeon), and of humans. These crystals are thought to be involved in magnetoreception, the ability to sense the polarity or the inclination of the earth's magnetic field, and to be involved in navigation. ==See also== *Ferrite *Haematite *Magnesia (mineral) *Maghemite == External links == * [http://it.wikipedia.org/wiki/Batteri_magnetotattici Magnetic bacteria (Italian)] * [http://crownminerals.med.govt.nz/minerals/gnsmaps/map-metmins.html Magnetite mining in New Zealand] * [http://www.santacruzpl.org/history/work/miner3.shtml Magnetite mining in Santa Cruz] * [http://www.astronomycafe.net/qadir/ask/a11651.html Bio-magnetics] OxidesIron compounds Magnetism Oxide minerals Iron minerals
I'm completely baffled by what the 'chemical formula" section here means, despite my PhD in chemistry. I'm not a geologist, so maybe the terminology makes sense, but can someone check up on this? As far as I understand, the IUPAC name for magnetite should be iron(II,III) oxide (note, there is no space between iron and the parenthesis), and the formula should be written as Fe3O4, or at least FeO.Fe2O3. I have never seen Fe2O2 before! Can someone fix this? I hesitate to do this, in case there is some convention in geology that I'm unaware of. Thanks, User:Walkerma 14:47, 18 Jan 2005 (UTC) :Done. Where did that come from? No geo convention that I know of. User:Vsmith 16:22, 18 Jan 2005 (UTC) Thank you for fixing this- I thought I was going crazy! User:Walkerma 15:48, 19 Jan 2005 (UTC)
See other meanings of words starting from letter:
Words begining with Magnetite:
Magnetite
Magnetite
Magnetite
{| border=1 cellspacing=0 align=right cellpadding=0 width=250 valign=top style="margin-left:1em" |----- align=center bgcolor="#9966FF" !colspan=2 align=center|Magnetite |----- align=center !colspan=2| Magnetite from the Kola Peninsula, Russia |----- align=center bgcolor="#9966FF" !colspan=2|General |----- |Category||Mineral |----- |Chemical formula|| iron(II),(III) oxide Fe3O4 |----- align="center" bgcolor="#9966FF" !colspan=2|Identification |----- | Colour || Black, greyish |----- | Crystal habit || Octahedral, fine granular to massive, |----- | Crystal structure || Isometric |----- | Cleavage|| Indistinct |----- | Fracture|| Uneven |----- | Mohs Scale hardness || 5.5 - 6.5 |----- | Luster|| Metallic |----- | Refractive index|| Opaque |----- | Pleochroism|| None |----- | Streak|| Black |----- | Specific gravity|| 5.17 - 5.18 |----- | Fusibility|| ? |----- | Solubility|| ? |----- align="center" bgcolor="#9966FF" !colspan=2|Major varieties |----- | Lodestone|| Magnetic and definitely with north and south poles |----- |} Magnetite is a magnetic mineral form of both iron(II) oxide and iron(III) oxide or (iron(II,III) oxide), with chemical formula , one of several iron oxides and a member of the spinel group. Magnetite is the most magnetic of all the minerals on Earth, and these magnetic properties led to lodestone being used as an early form of magnetic compass. Small grains of magnetite occur in almost all igneous rocks and metamorphic rocks as well as many sedimentary rocks. Magnetite is a valuable source of iron ore. It dissolves slowly in hydrochloric acid. Large deposits of magnetite are found in Kiruna, Sweden, and in the Adirondack Mountains region of New York in the United States. Deposits are also found in Norway, Germany, Italy, Switzerland, South Africa, India, Mexico, and in Oregon, New Jersey, Pennsylvania, North Carolina, Virginia, New Mexico, Utah, and Colorado in the United States. Magnetite is sometimes found in large quantities in beach sand. Such mineral sands or iron sands or black sands are found in various places such as California and the west coast of New Zealand. The magnetite is carried to the beach via rivers from erosion and is concentrated via wave action and currents. Crystals of magnetite have been found in some bacterium (e.g., Aquaspirillum magnetotacticum) and in the brains of bees, of termites, of some birds (e.g., the pigeon), and of humans. These crystals are thought to be involved in magnetoreception, the ability to sense the polarity or the inclination of the earth's magnetic field, and to be involved in navigation. ==See also== *Ferrite *Haematite *Magnesia (mineral) *Maghemite == External links == * [http://it.wikipedia.org/wiki/Batteri_magnetotattici Magnetic bacteria (Italian)] * [http://crownminerals.med.govt.nz/minerals/gnsmaps/map-metmins.html Magnetite mining in New Zealand] * [http://www.santacruzpl.org/history/work/miner3.shtml Magnetite mining in Santa Cruz] * [http://www.astronomycafe.net/qadir/ask/a11651.html Bio-magnetics] OxidesIron compounds Magnetism Oxide minerals Iron minerals
Magnetite
I'm completely baffled by what the 'chemical formula" section here means, despite my PhD in chemistry. I'm not a geologist, so maybe the terminology makes sense, but can someone check up on this? As far as I understand, the IUPAC name for magnetite should be iron(II,III) oxide (note, there is no space between iron and the parenthesis), and the formula should be written as Fe3O4, or at least FeO.Fe2O3. I have never seen Fe2O2 before! Can someone fix this? I hesitate to do this, in case there is some convention in geology that I'm unaware of. Thanks, User:Walkerma 14:47, 18 Jan 2005 (UTC) :Done. Where did that come from? No geo convention that I know of. User:Vsmith 16:22, 18 Jan 2005 (UTC) Thank you for fixing this- I thought I was going crazy! User:Walkerma 15:48, 19 Jan 2005 (UTC)
See other meanings of words starting from letter:
M
MA | MB | MC | MD | ME | MF | MG | MH | MI | MJ | MK | ML | MN | MO | MP | MR | MS | MT | MU | MW | MX | MY | MZ |Words begining with Magnetite:
Magnetite
Magnetite
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