The interactions between benzene molecules in the solid phase is of fundamental interest. Benzene is often used as a model system for structure prediction methodologies and calculating lattice mode vibrations in molecular crystals and the information that structural studies can provide to test these calculations is invaluable. In this experiment, we propose to study the behaviour of phase I of benzene and investigate anomalies we have observed in the pressure-volume behaviour at relatively low pressure. These anomalies, if confirmed and found to have a structural origin, will have an impact on the phase diagram of benzene and provide new information for those modelling fundamental small-molecule systems