Figure 12
(a) The variation in total electronic energy with molar volume, computed in CASTEP, for the two MgSO4·5H2O polymorphs. The solid lines represent Birch–Murnaghan third-order equations of state fitted to the points, the parameters of which are given in Table 4. (b) The variation in enthalpy (in the athermal limit) relative to that of the phase. |