Similar results were found at 300 K, with the minima structure shifted at about 0.2 to 0.3 GPa. At 600 K, the low-pressure part of the PES curve is difficult to interpret, but a continuous transformation is observed below 0.5 GPa, with a decrease of volume of about 8% (the experimental one of the dioxolane silica sodalite in the same P range at 300 K is 3%) . No further transitions were found at higher pressure: the isotropic constraints adopted in these simulations prevent the breaking of the lattice symmetry, thus the observation of the experimentally characterized cubic to rhombohedral transition. A recent work which used the Consistent Valence Force Field characterized the pressured induced amorphization of SOD at 300 K , finding it occurring as a discontinuous transition a 6.81