Netroxium is a super-dense element found on sevral planets and can be used for power generation, hyperdrives, shields etc. It is found mainly deep underground, due to the fact that if it mixes with a certain element present on most planets, it reacts with an explosion. The first discovery was on Kortorisa IV by the Gammetans in 2009, and since then they have used it and traded it out to sevral sovereign systems for alot of credits.
Netroxium has similar properties to Naquadriah, except it is present on more planets, and it does that thing with some air... Oh yeah, explodes.
1cm³ of this element is capable of producing a shield that can absorb 4 BOW Super Lasers, therefore it is very powerful.