Gravitonium

Gravitonium is a rare, high atomic number element that possesses unique gravitational properties. Gravitonium has an atomic number of 123 and an atomic mass of 308.

History
Gravitonium is an extremely rare, high atomic numbered element, so rare that many din't even believe it existed. Gravitonium's existence and applications were first theorized by Dr. Franklin Hall. Dr. Hall theorized the elements' effects on gravity, and was possibly the only scientists that could determine how to control the gravitational field produced by the element for use on other objects. As part of his theories about Gravitonium, Hall also designed a theoretical machine that could stimulate the element in a way that would allow its gravitational fields to be harnessed.

After two decades of searching twelve mines across the world, an actual store of Gravitonium was discovered by Dr. Hall's former associate Ian Quinn. Quinn wished to use the element for his own personal gains and began building miniature gravity field generators based on Hall's designs. Quinn later kidnapped Hall himself so that he could unlock the secretes behind using the new element.

The only known mass of Gravitonium is now in S.H.I.E.L.D.'s possession on lock-down at a storage facility known as "the Fridge".

Properties
Gravitonium possesses unique gravitational properties. A mass of Gravitonium atoms distorts gravity fields within itself, giving itself an undulating, amorphous shape. However, when stimulated by an electrical current the mass of Gravitonium will solidify into a uniform sphere, and causes powerful gravity fields to emanate outwardly from it. These gravity fields cause changes in the rules of gravity in various ways within a certain proximity of it. This can range from phenomenon such as levitating objects by reversing the pull of gravity or increasing gravity and shifting the direction/point of attraction.