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Relation between the high density phase and the very-high density phase of amorphous solid water
Nicolas Giovambattista1, H Eugene Stanley, Francesco Sciortino
1Center for Polymer Studies and Department of Physics, Boston University, Boston, Massachusetts 02215, USA.
Physical Review Letters
|March 24, 2005
Summary
Very high-density amorphous (VHDA) ice is a more stable form of high-density amorphous (HDA) ice. Our findings suggest VHDA represents the amorphous ice formed from the quenched high-density liquid (HDL) state of water.
Area of Science:
- Physical Chemistry
- Materials Science
- Condensed Matter Physics
Background:
- The structural states of amorphous water are debated, with hypotheses including the low-density liquid (LDL)-high-density liquid (HDL) scenario.
- Recent studies propose a distinct very high-density amorphous (VHDA) ice state, challenging existing models.
Purpose of the Study:
- To investigate the stability and structural relationship of very high-density amorphous (VHDA) ice.
- To test the interpretation of VHDA as a distinct structural state and its relation to the LDL-HDL hypothesis.
Main Methods:
- Extensive computer simulations were employed.
- Analysis focused on the structural properties and stability of different amorphous ice forms.
Main Results:
- Very high-density amorphous (VHDA) ice was found to be a more stable form of high-density amorphous (HDA) ice.
- Simulations support the interpretation that VHDA is the amorphous ice state derived from quenched high-density liquid (HDL) water.
Conclusions:
- The existence and stability of VHDA ice are confirmed.
- VHDA ice represents the amorphous counterpart of the quenched HDL water state, refining our understanding of water's complex phase behavior.