what is magnitite

Magnetite, sometimes called lodestone, is an ore of iron that shows magnetic property. It points towards the north south direction because of the earth's magnetic field. Because of this property load stones were used as the earliest magnetic compass for navigation.

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Magnetite is a type of iron oxide with natural magnetic properties. In fact, it is the most magnetic naturally occurring mineral on Earth and was once used in compasses. Its chemical name is ferrous-ferric oxide, and its chemical formula is Fe3O4.

This mineral occurs in nearly all igneous and metamorphic rocks, though usually only in small particles or in a solution with other minerals. Some beaches, often called black sand beaches, have heavy magnetite deposits. There are also significant, concentrated deposits of it and hematite, a mineral resulting from the reaction of magnetite with oxygen, in very old sedimentary rock formations known as banded iron formations.

In addition to geological formations, magnetite is found in small quantities in certain bacteria and animals. Chitons, a type of mollusk, have the crystals on their radula, a scraping appendage used to eat. These crystals make the radula very abrasive, allowing chitons to scrape food from rocks.

Magnetite naturally occurs in the brains of some birds and insects, notably bees, and even in humans. It is hypothesized to allow for a sense called magnetoreception or magnetoception, through which the animals in question have a natural sense of direction. Biomagnetism may allow animals to sense the magnetic field of the Earth, much as a compass uses magnetism to indicate the cardinal directions. For example, crystals in the brains of certain birds may help trigger and direct their migratory flight when the seasons change.

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Magnetite is a mineral, one of the two common naturally occurring iron oxides (chemical formula Fe3O4) and a member of the spinel group. Magnetite is the most magnetic of all the naturally occurring minerals on Earth.[6] Naturally magnetized pieces of magnetite, called lodestone, will attract small pieces of iron, and this was how ancient people first noticed the property of magnetism.

Small grains of magnetite occur in almost all igneous and metamorphic rocks. It is black or brownish-black with a metallic luster, has a Mohs hardness of 5–6 and a black streak.

The chemical IUPAC name is iron(II,III) oxide and the common chemical name is ferrous-ferric oxide.

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Magnetite is a mineral, one of the two common naturally occurring iron oxides (chemical formula Fe3O4) and a member of the spinel group. Magnetite is the most magnetic of all the naturally occurring minerals on Earth.[6] Naturally magnetized pieces of magnetite, called lodestone, will attract small pieces of iron, and this was how ancient people first noticed the property of magnetism.

Small grains of magnetite occur in almost all igneous and metamorphic rocks. It is black or brownish-black with a metallic luster, has a Mohs hardness of 5–6 and a black streak.

The chemical IUPAC name is iron(II,III) oxide and the common chemical name is ferrous-ferric oxide.

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