Visual Observations of the Amorphous-Amorphous Transition in H2O Under Pressure
Abstract
The vapor-deposited low-density amorphous phase of H2O was directly compressed at 77 kelvin with a diamond-anvil cell, and the boundary between the low-density amorphous phase and the high-density amorphous phase was observed while the sample was warmed under compression. The transition from the low-density amorphous phase to the high-density amorphous phase was distinct and reversible in an apparently narrow pressure range at ∼130 to ∼150 kelvin, which provided experimental evidence for polymorphism in amorphous H2O.
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Published In
Science
Volume 254 | Issue 5030
18 October 1991
18 October 1991
Copyright
1991 by the American Association for the Advancement of Science.
Submission history
Received: 16 April 1991
Accepted: 13 August 1991
Published in print: 18 October 1991
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