[DEU] Update v29.33.53 (Revised Colony War, Selene & Lhote) by end of April 2018.



Ionium was a name given early in the study of radioactive elements to Thorium-230 (230Th), a radioactive isotope of thorium (atomic number 90) which can be used to date corals and determine ocean current flux. The name was used before it became known that ionium and thorium are chemically identical. Thorium has been considered an alternative nuclear fuel to uranium.