In situ observations of a high-pressure phase of H2O ice
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.
Citation Information
Publication Year | 1998 |
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Title | In situ observations of a high-pressure phase of H2O ice |
DOI | 10.1126/science.281.5378.809 |
Authors | I.-Ming Chou, J.G. Blank, A.F. Goncharov, Ho-kwang Mao, R.J. Hemley |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Science |
Index ID | 70020775 |
Record Source | USGS Publications Warehouse |