Atomic Hydrogen Occluded in Iron Nitride.
ATOMIC hydrogen in iron has so far been known to ))
be occluded when iron is quenched from a high tem- ))
perature in water or when iron is electrolytically )))
deposited. )))
1 have observed the existence of atomic
hydrogen in iron nitride prepared by heating iron in
the current of ammonia gas. I confirmed it by
measuring the single potential of the iron nitride in
normal ferrous sulphate solution. The time voltage
curve of the iron nitride showed a minimum due to
atomic hydrogen at the beginning, similar to that
which appeared in the curve of iron quenched and
loaded with atomic hydrogen, obtained by T. W.
Richards. 1
I also confirmed the existence of atomic hydrogen
by immersing the iron nitride in a solution of potassium
ferricyanide and observing the formation of Prussian
blue on adding the ferric chloride solution. This re-
duction, K 3 Fe(CN) 6 +atomic K 4 Fe(CN) 6 ,
also takes place with the iron quenched in water, and ))
thus loaded with atomic hydrogen, but never with )))
ordinary iron. SHUN-TCHI SATOH. )))
Mitsubishi Research Laboratory,
Tokyo, Japan.
1 Zdt. physikal. Chem., 58, 310; 1907