Talk:Arc Reactor/@comment-30579351-20161123135946/@comment-2106279-20161229203541

No name is given. The Iron Man 2 novel refers to it as "vibranium", but Captain America: The First Avenger, Avengers: Age of Ultron, and Captain America: Civil War clarify that vibranium is a rare metallic element found only in Wakanda. It's not an element one makes in a lab or uses to power arc reactors.

However, in Captain America: The First Avenger, Howard Stark uses a particle that Captain America found, an elemental particle, that creates an explosion. The element Tony created in Iron Man 2 is most likely an evolved variant of that experiment.