Trellium-D: Trellium-D is a highly unstable substance that all races in the Delphic Expanse line the intereor of their ships with.  They do because of the anomolies.  The Trellium Ore somehow stops the anomolies from entering your ship.  But Trellium-D has its downsides.  It is poisonous to ALL Vulcans, and turns them into zombie-like creatures who are insane, deformed, and have no sense of judgment, to put it lightly.  Really, they have no sense at all.  Trellium-D can only be set in it's liquid form and there is a way to create it.  But once attempted, was never again, due to an explosion that destroyed the science lab onboard Enterprise.  Though we do know it does work.  Enterprise lined Shuttlepod One with it in order to approach a sphere.

Kemmocite: It is a highly unstable substance, mined by the xindi-arboreal people.  Archer once infiltrated a facility for mining this ore.  IT is very important for the construction of the xindi weapon.