I am writing a science-fiction story, and I am planning on making Aluminum this ultra-valuable element (Which adds irony - Aluminum is the third most abundant element on Earth!) Even if ol' atomic no. 13 is as common throughout the universe as it is on Earth, I can bring up 'multiverse' to get away with it. I think it'd still be nice to know.
Interesting, the aluminum must flow? Aluminum is not as common as other elements. It is not readily produced in the cores of stars through the alpha-capture process (which produces things like carbon, oxygen, neon, magnesium, silicon, etc.). This means it is only produced via supernova explosions. The table in Wikipedia (see link below) will give you an idea of the relative abundance to other elements. (Notice that magnesium and silicon, which are before and after aluminum, are nearly 100 times more abundant). As a fellow, Sci-Fi enthusiast, I'd remind you to make you're story believable. If you decide that your universe won't have supernovae, remember that would mean there would be no iron, gold, uranium, etc. My answer has been long enough, but I'm sure you have an idea why aluminum is so abundant on the Earth's crust so I'll stop here.
