Would the ending products, not caring about the fireworks, actually be produce? I've never heard of hydroxides degrading under heat.
The water thing doesn't make sense to me, though. If I were going to be doing this I would do it with all the oxygen surrounding the mixture removed, so if water was formed, the oxygen would have to come from the hydroxide (and there would be nothing to oxidize the other metal, magnesium or otherwise).
Isn't a thermite reaction a general term, though? according to Wiki, "Thermite is a pyrotechnic composition of a metal powder and a metal oxide." It doesn't say it has
to be aluminum. and technically, a hydroxide is still an oxide.
Thanks for the reply, though!
Edit: I think I realized my mistake about the water, 4OH to 2H2O +O2, not 2OH to H2O.