Iron

Iron is a chemical element; it has symbol Fe () and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most abundant element in the Earth's crust. In its metallic state it was mainly deposited by meteorites.

thumb|upright=1.35|Colors and porous surface texture of rust

group of iron-carbon alloys

Cementite (or iron carbide) is a compound of iron and carbon, more precisely an intermediate transition metal carbide with the formula Fe3C. By weight, it is 6.67% carbon and 93.3% iron. It has an orthorhombic crystal structure. It is a hard, brittle material, normally classified as a ceramic in its pure form, and is a frequently found and important constituent in ferrous metallurgy. While cementite is present in most steels and cast irons, it is produced as a raw material in the iron carbide process, which belongs to the family of alternative ironmaking technologies. The name cementite origin

iron alloy with a high carbon content

iron alloy with a very low carbon content and with fibrous slag inclusions, worked with hammers or dies

thumb|Scanning electron microscope|SEM micrograph of etched pearlite, 2000X.

form of iron

Pelletizing is the process of compressing or molding a material into the shape of a pellet. A wide range of different materials are pelletized including chemicals, iron ore, animal compound feed, plastics (nurdles), waste materials, and more. The process is considered an excellent option for the storage and transport of said materials. The technology is widely used in the powder metallurgy engineering and medicine industries.

form of iron ore

planetary, alchemical and gender symbol

alloy of iron and carbon

hypothetical class of compact stars

extrasolar terrestrial planet

thumb|250px|Ferrosilicon alloy

thumb|A bloomery in operation. The bloom will eventually be drawn out of the bottom hole.

nuclides with atomic number of 26, but with differing mass numbers

type of rechargeable battery

newly mined and refined type of metal

Experiment designed to test Albert Einstein's theory of general relativity

poisoning due to excess quantities of iron

thumb|Iron(II) chloride tetrahydrate, .

workshop used to manufacture wrought iron products

iron originating from a meteorite rather than from the Earth since formation

right|thumb|A solar eclipse, with the solar corona visible. Coronium was the name of a suggested chemical element, hypothesised in the 19th century. The name, inspired by the solar corona, was given by Gruenwald in 1887. A new atomic thin green line in the solar corona was then considered to be emitted by a new element unlike anything else seen under laboratory conditions. It was later determined to be emitted by iron (Fe13+), so highly ionized that it was at that time impossible to produce in a laboratory.

form different types of steel

Forge for making wrought iron from pig iron

US trade association

fine iron powder

iron ores found in the south of Luxembourg and in Lorraine

ferrite with a acicular microstructure

Biogeochemical cycle of Fe2+/Fe3+

early method of iron processing

railroad destruction tactic used in the American Civil War

plant disorder

set of processes for obtaining iron from iron ore

thumb|Piles of scrap metal collected for the World War II effort, thumb|Collection of leftover scrap metal items

Use of Iron by organisms

iron-ore mining districts around Lake Superior in the United States and Canada

medication

group specially prepared, highly reactive metal powder

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direct-reduction steelmaking process

thumb|Mineral stains, Rosedale, North Yorkshire|Rosedale Cliffs – marks caused by chalybeate waters thumb|Chalybeate spring below Cascada de los Colores, La Palma