Pyrophoric iron was prepared through thermal decomposition of iron(II)oxalate-Fe(COO)2*2H2O. We tested three different methods, but best results were obtained when pure oxygen was blown into the pyrophoric iron filled test tube.
This is one experiment from "100+ experiments in chemistry" collection and the fully explained video is available at http://www.chemicum.com .

ferro pyrophoric
hierro pirofórico
pyrophoren Eisen
fer pyrophorique
ferro piroforico
пирофорнoe железo
自燃铁
pürofoorne raud