Figure 7
(a) Pressure and (b) temperature dependence of unit-cell parameters a, b, c in α-DL-menthol (squares and α subscripts) and β-DL-menthol (diamonds and β subscripts; cf. Fig. S7). For convenient comparisons of analogous lattice directions, the unit-cell parameters of the monoclinic β-DL-menthol (superscript m in the legend) are transformed to the triclinic lattice [superscript t, cf. equation (2)]. The pressure dependence of the unit-cell parameters for the lattices in the settings of polymorphs α and β are plotted in Figs. S7–S9. |