Irillium

Irillium is an element which may occur as an impurity in ryetalyn.

• It was first discovered by Humans in 2029, inside asteroids.
• The presence of irillium in ryetalyn renders it pharmacologically inert, and useless as a treatment for Rigelian fever.

It has the chemical symbol "Im," an atomic mass of 305 (for its most stable isotope), and an atomic number of 116. The element is usually radioactive.