Abstract
The crystal structure and equation of state of solid hydrogen have been determined directly to 26.5 gigapascals at room temperature by new synchrotron x-ray diffraction techniques. Solid hydrogen remains in the hexagonal close-packed structure under these pressure-temperature conditions and exhibits increasing structural anisotropy with pressure. The pressure-volume curve determined from the x-ray data represents the most accurate experimental measurement of the equation of state to date in this pressure range. The results remove the discrepancy between earlier indirect determinations and provide a new experimental constraint on the molecular-to-atomic transition redicted at higher pressures.
Original language | English |
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Pages (from-to) | 1131-1134 |
Number of pages | 4 |
Journal | Science |
Volume | 239 |
Issue number | 4844 |
DOIs | |
Publication status | Published - 1988 |
Externally published | Yes |
ASJC Scopus subject areas
- General