[zzazzdsa]

From a practical point of view, the only semi-common thermites that can actually explode are copper and silver. However, these thermites do not "detonate" as in the definition. They merely deflagrate extremely quickly, quickly enough to fool an observer but not in the true physical sense.

[ocfnash]

Very interesting, thanks!

I carried out two rounds of thermite "experiments", both times using oxides of iron, manganese, and copper. I witnessed two "explosions" (I now presume deflagrations) and they occurred with the copper oxide. I've occasionally wondered if that was a coincidence that it was the same metal that "exploded" both times. Mystery solved: apparently not!