Listing description
Magnetite is a mineral and one of the
main iron ores. With the chemical formula Fe3O4, it is one of
the oxides of iron. Magnetite is ferrimagnetic; it is attracted to a magnet and can be magnetized to become a permanent magnet itself.
Detailed description
It is the most magnetic of all the
naturally-occurring minerals on Earth.[5][7] Naturally-magnetized
pieces of magnetite, called lodestone, will attract small pieces of iron, which is how ancient
peoples first discovered the property of magnetism. Today it is mined as iron ore.
Small grains of magnetite occur in almost all igneous and metamorphic rocks. Magnetite is black or brownish-black with a metallic luster,
has a Mohs hardness of 5–6 and leaves a black streak.[5]
The chemical IUPAC name is iron(II,III)
oxide and the common chemical name is ferrous-ferric oxide.
Applications
Due to its high iron content, magnetite has long
been a major iron
ore.[29] It is reduced in
blast furnaces to pig iron or sponge iron for conversion to steel.
Magnetic recording
Audio recording using magnetic
acetate tape was developed in the 1930s. The German magnetophon utilized magnetite powder as the
recording medium.[30] Following World
War II, the 3M company continued
work on the German design. In 1946, the 3M researchers found they could improve
the magnetite-based tape, which utilized powders of cubic crystals, by
replacing the magnetite with needle-shaped particles of gamma ferric oxide (γ-Fe2O3).[30]
Catalysis
Magnetite is the catalyst for the industrial
synthesis of ammonia.
PRICE
$58.3/MT
For more information:
mobile: +2348039721941
contact person: emeaba uche
e-mail: emeabau@yahoo.com
website: www.franchiseminerals.com
No comments:
Post a Comment