Fig. 3. (a) High-pressure XRD patterns of the phenanthrene crystal below 2.08 GPa. (b) Plotted curves for the unit cell volume of phenanthrene as a function of pressure. Inset shows the compression rate of lattice constants as pressure increases, which is given by the monoclinic P21 structure. (c) The crystal structure viewed along the b-axis, in which the marked regions represent the head-to-head approach between molecules. The XRD patterns are analyzed by JADE.
