Journal
PHYSICAL REVIEW LETTERS
Volume 92, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.92.225702
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We report results of molecular dynamics simulations of amorphous ice in the pressure range 0- 22.5 kbar. The high-density amorphous (HDA) ice prepared by compression of I-h ice at T=80 K is annealed to T=170 K at intermediate pressures in order to generate relaxed states. We confirm the existence of recently observed phenomena, the very high-density amorphous ice, and a continuum of HDA forms. We suggest that both phenomena have their origin in the evolution of the network topology of the annealed HDA phase with decreasing volume, resulting at low temperatures in the metastability of a range of densities.
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