Etude cristallographique de la transition de phase du benzil

Benzil exhibits a solid-solid phase transition at 83.3 < T_c < 83.4 K. The low-temperature lattice is complex triclinic: there are three kinds of domain and the space group is a pseudo-symmetry group P321. The lattice of each domain is triclinic, pseudo-hexagonal, with the three domains arranged around a pseudo-threefold axis.