"island of stability'' means stability relative to the surrounding elements. If it should prove to exist, then, it's a couple of elements which, most likely, have isotopes which take whole minutes to spontaneously decay. This is considerably more stable than the neighbors, which in that area will decay with a half-life of milliseconds. But it's not the sort of stability that's of much obvious use for anything besides confirming models of nuclear particle interactions.
I didn't make that obvious in my post. Sorry.
However, it still *might* be possible to get a stable isomer in these huge nuclei. I don't know enough to really make that prediction....But it's within the realm of possibility and would be really cool if it were true! ...Not entirely sure what it would be good for... But it'd be cool!
I figure dilithium is a second-stage element - it's an isotope of Lithium with a subspace component. Trititanium is Titanium with a subspace quark in it's makeup. Tritanium is an alloy of titanium and trititanium, since Trititanium is too expensive to use for the whole hull. Duranium is second-stage iron.
What do you mean by "second stage"? I don't know this speculation.
My own speculation --and it's a recent one I've not spent much time thinking about it or its consequences-- is that "dilithium" is a very stable chemical state where two lithium atoms are chemically bound by their inner electrons. Which is to say, the two electrons in the inner s-orbit of regular lithium are somehow forced to orbit two lithium nuclei at the same time. The left-over duo of outer electrons are then free for more conventional chemical bonds. And it is with these outer electrons that "dilithium" can be forced to crystallize, a crystal with some interesting properties.
I would then speculate that "trilithium" and "tritanium" are elemental triplets sharing internal electrons. In the former case, very unstably; in the latter, rather stably.
This kind of inner-electron sharing has just started to be explored in the "real world". Right now such chemical bonds are literally created by bombarding a target with chemicals travelling at a significant percentage of the speed of light. And everything I've read indicates they're rather unstable, as of yet... It's called "Metastable Innershell Molecular State" so at the moment they're not thought of as "stable". But it's a fascinating field of study with so much promise!
"Duranium" has a historic definition as alloy of aluminium, if I remember correctly. Of course, that may well change after a few hundred years.