Kironide

Kironide (symbol Ki) is a chemical element, atomic number 139 on the periodic table.

Characteristics and history
Kironide, in its most stable form, has an atomic mass of 328, and was discovered by Vulcans (and the Federation) for the first time in planet 's year 8756. This element is part of the trans-uranic series of heavy elements. 

The former inhabitants of the Sahndara star system, the Platonians, found that kironide could be applied to release telekinetic and psychokinetic powers in humanoid lifeforms. 

Background
In real-life science, element 139 has yet to be discovered. A placeholder name based on its number, "untriennium", has been suggested to document the possible existence of this substance. Some models of theoretical science have stated that heavy elements on this scale may be impossible to synthesize or reproduce, and cannot exist in nature. Subspace science mentioned in Star Trek may account for the contradiction of this being possible in future situations.