FIELD: investigation of molecular structure of solids, nature of chemical links and intracrystalline fields. SUBSTANCE: method of analysis of molecular structure of polycrystals consists in consecutive measurement of spectrum of frequencies of nuclear quadrupole resonance of all nonequivalent nuclei in molecule by pulse method. Magnetization of quadrupole nuclei reservoir, energy transfer of Zeeman reservoir of quadrupole nuclei into dipole reservoir of magnetic nuclei is conducted at expanse of crossing of levels, times of cross-relaxation for all spectral lines are measured selectively. Molecular structure of polycrystal is determined by use of empiric and theoretical expressions relating radius-vectors, coupling spins and valent angles to times of cross- relaxation. EFFECT: improved authenticity of method. 2 dwg, 1 tbl
