All other isotopes of aluminium are radioactive. Essentially the most secure of these is 26Al, which has a half-lifetime of 717,000 several years: whilst it had been current coupled with secure 27Al in the interstellar medium from which the Photo voltaic Technique fashioned (consider to are actually produced by stellar nucleosynthesis https://hectorwncre.blogoxo.com/37767607/not-known-factual-statements-about-aluminium-greenhouse