Abstract By reduction of sulfur nitride, S4N4, with hydrazine, N2H4, we have prepared all the seven eight-membered ring sulfurimines in the crystallized form. However, besides sulfurimine crystals, one notes the presence of elongated hexagonal crystals, which are very different in size and morphology. A study of these isolated crystals by: Chemical analysis. Infrared spectrography and UV spectrography. Radiocrystallography, shows that they are ...