NMR properties:

Magnetogyric Ratio NMR frequency Natural abundance (NA) Nuclear spin (I) Quadrupole moment (Q) Reference sample
96 Mo
96 Mo
42

(Gr. molybdos, lead) Before Scheele recognized molybdenite as a distinct ore of a new element in 1778,
it was confused with graphite and lead ore. The metal was prepared as an impure form in 1782 by Hjelm.
Molybdenum does not occur native, but is obtained principally from molybdenite. Wulfenite, and
Powellite are also minor commercial ores.
Sources
Molybdenum is also recovered as a by-product of copper and tungsten mining operations. The metal is
prepared from the powder made by the hydrogen reduction of purified molybdic trioxide or ammonium
molybdate.
Properties
The metal is silvery white, very hard, but is softer and more ductile than tungsten. It has a high elastic
modulus, and only tungsten and tantalum, of the more readily available metals, have higher melting
points. It is a valuable alloying agent, as it contributes to the hardenability and toughness of quenched
and tempered steels. It also improves the strength of steel at high temperatures.
Uses
It is used in certain nickel-based alloys, such as the "Hastelloys(R)" which are heat-resistant and
corrosion-resistant to chemical solutions. Molybdenum oxidizes at elevated temperatures. The metal has
found recent application as electrodes for electrically heated glass furnaces and foreheaths. The metal is
also used in nuclear energy applications and for missile and aircraft parts. Molybdenum is valuable as a
catalyst in the refining of petroleum. It has found applications as a filament material in electronic and
electrical applications. Molybdenum is an essential trace element in plant nutrition. Some lands are
barren for lack of this element in the soil. Molybdenum sulfide is useful as a lubricant, especially at high
temperatures where oils would decompose. Almost all ultra-high strength steels with minimum yield
points up to 300,000 psi(lb/in.2) contain molybdenum in amounts from 0.25 to 8%.