Talk:Aluminate

Correct formula?

Isn't Aluminate AlO₃^3-?

At least, that's what my Chemistry taught me when we went over polyatomic ions.

absolutely right! I doubt whether such an ion exists- aluminium is usually tetrahedrally coordinated and occasionally octahedral. There are aluminates with formula Na₅AlO₄, Li₅AlO₄ with discrete AlO₄^5- ions!, other aluminates have tetrahedral units sharing corners, aluminates like NaAlO₂ have a 3D polymeric ion (AlO₂-)n. I'll revisit this page and tidy it up.--Axiosaurus (talk) 09:12, 9 November 2008 (UTC)

Barium aluminate?

I see a lot of references in the literature to a "Barium Aluminate" that's used as a gas absorber in vacuum tubes. Apparently the barium on the surface binds with stray oxygen atoms, then the aluminum steals them, refreshing the surface for more absorption. There is no page for "barium aluminate", and I can't find a reference to the chemical formula for it. Anyone got a good reference?

Riventree (talk) 16:12, 3 March 2018 (UTC)