Visual Observations of the Amorphous-Amorphous Transition in H 2 O Under Pressure

• DOI: 10.1126/science.254.5030.406
• Publication Date: 2006-10-05T22:10:16Z
• Authors: Osamu Mishima; K. Takemura; K. Aoki
• Keywords: Polyamorphism; Amorphous ice; Amorphous carbon

The vapor-deposited low-density amorphous phase of H 2 O was directly compressed at 77 kelvin with a diamond-anvil cell, and the boundary between high-density observed while sample warmed under compression. transition from to distinct reversible in an apparently narrow pressure range ∼130 ∼150 kelvin, which provided experimental evidence for polymorphism O.