NMR properties:

Magnetogyric Ratio NMR frequency Natural abundance (NA) Nuclear spin (I) Quadrupole moment (Q) Reference sample
56 Fe
56 Fe

(Anglo-Saxon, iron; L. ferrum) Iron was used prehistorically:
l Genesis mentions that Tubal-Cain, seven generations from Adam, was "an instructor of every
artificer in brass and iron."
l A remarkable iron pillar, dating to about A.D. 400, remains standing today in Delhi, India. This
solid shaft of wrought iron is about 7 1/4 m high by 40 cm in diameter. Corrosion to the pillar has
been minimal although it has been exposed to the weather since its erection.
Iron is a relatively abundant element in the universe. It is found in the sun and many types of stars in
considerable quantity. Its nuclei are very stable. Iron is a principal component of a meteorite class known
as siderites and is a minor constituent of the other two meteorite classes. The core of the earth -- 2150
miles in radius -- is thought to be largely composed of iron with about 10 percent occluded hydrogen.
The metal is the fourth most abundant element, by weight that makes up the crust of the earth.
The most common ore is hematite, which is frequently seen as black sands along beaches and banks of
Common irons is a mixture of four isotopes. Ten other isotopes are known to exist.

Iron is a vital constituent of plant and animal life and appears in hemoglobin.
Taconite is becoming increasingly important as a commercial ore. The pure metal is not often
encountered in commerce, but is usually alloyed with carbon or other metals.
The pure metal is very reactive chemically and rapidly corrodes, especially in moist air or at elevated
temperatures. It has four allotropic forms or ferrites, known as alpha, beta, gamma, and omega, with
transition points at 700, 928, and 1530C. The alpha form is magnetic, but when transformed into the beta
form, the magnetism disappears although the lattice remains unchanged. The relations of these forms are
peculiar. Pig iron is an alloy containing about 3 percent carbon with varying amounts of Sulfur, Silicon,
Manganese, and Phosphorus.
Iron is hard, brittle, fairly fusible, and is used to produce other alloys, including steel. Wrought iron
contains only a few tenths of a percent of carbon, is tough, malleable, less fusible, and has usually a
"fibrous" structure.
Carbon steel is an alloy of iron with small amounts of Mn, S, P, and Si. Alloy steels are carbon steels
with other additives such as nickel, chromium, vanadium, etc. Iron is a cheap, abundant, useful, and
important metal.