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In situ observations of a high-pressure phase of H2O ice

Science

By:
, , , , and
DOI: 10.1126/science.281.5378.809

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Abstract

A previously unknown solid phase of H2O has been identified by its peculiar growth patterns, distinct pressure-temperature melting relations, and vibrational Raman spectra. Morphologies of ice crystals and their pressure-temperature melting relations were directly observed in a hydrothermal diamond-anvil cell for H2O bulk densities between 1203 and 1257 kilograms per cubic meter at temperatures between -10??and 50??C. Under these conditions, four different ice forms were observed to melt: two stable phases, ice V and ice VI, and two metastable phases, ice IV and the new ice phase. The Raman spectra and crystal morphology are consistent with a disordered anisotropic structure with some similarities to ice VI.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
In situ observations of a high-pressure phase of H2O ice
Series title:
Science
DOI:
10.1126/science.281.5378.809
Volume
281
Issue:
5378
Year Published:
1998
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
809
Last page:
812