Dynamics of amorphous water, via migration of 3- and 5-coordinated H2O

The dynamics of TIP4P amorphous water is explored at 155 K. Both translational and orientational mobilities are dominated by the activity of 3- and 5-coordinated defects. Significant molecular displacements occur concurrently with changes of coordination during defect jumps, defect pair formation, and defect pair annihilation.