The crystal structure of γ-phase p-dichlorobenzene at low temperature and high pressure by high-resolution neutron powder diffraction

The crystal structure of γ-phase p-dichlorobenzene at low temperature and high pressure was investigated by high-resolution neutron powder diffraction (HRPD). Neutron powder diffraction data were recorded on a 5g sample of predeuterated (98%) p-DCB using the HRPD. It was found from the neutron diffraction study that the γ-phase of p-DCB persisted to 5 kbar at 295 K. The refinement of the structure at high pressure was found to be impossible because of the preferred orientation effects.