In the course of work on the Raman spectra of solids at low temperatures, we have succeeded in photographing the spectrum of the light scattered by solidified nitrogen peroxide (N2O4), at a temperature of about - 80°C.
Vegard, Zeits. für Physik, 68, p. 184; 1931.
McLennan, Smith and Wilhelm, Trans. Roy. Soc. Canada, 24, p. 197; 1930.