Polymorphic transition in p-dihlorbenzol nanoparticles

We have obtained experimentally the low frequency Raman spectra of p-dihlorbenzol nanoparticles. Nanoparticle sizes are determined with the help of electron microscope. It was found that in the lattice vibration spectra from 70 nm the summary spectrum of {\alpha}-paradihlorbenzola and {\beta}-paradihlorbenzol structures appears. It agrees with both calculations of nanoparticle structure by molecular dynamics and calculations of spectra histograms of the lattice vibrations by a Dyne's method.