In 1918, Mandelstam theoretically predicted the fine structure splitting in Rayleigh scattering due to light scattering on thermal acoustic waves. Beginning from 1926, Mandelstam and Landsberg initiated experimental studies on vibrational scattering of light in crystals at the Moscow State University. As a result of this research, Landsberg and Mandelstam discovered the effect of the combinational scattering of light on 21 February 1928. They presented this fundamental discovery for the first time at a colloquium on 27 April 1928. They published brief reports about this discovery (experimental results with some attempt at a theoretical explanation) in RussianG.S. Landsherg, L.I. Mandelstam, "New phenomenon in scattering of light (preliminary report)", Journal of the Russian Physico-Chemical Society, Physics Section 60, 335 (1928). and in German and then published a comprehensive paper in Zeitschrift für Physik.
