High-pressure structural study of solid mercury up to 200 GPa

High-pressure powder x-ray diffraction experiments have been carried out on solid mercury up to 196 GPa at room temperature. The hexagonal-close-packed δ phase, which exists above 36 GPa, is found to remain stable up to the highest pressure investigated. The c a axial ratio monotonously decreases un...

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Bibliographic Details
Published in:Materials research express 2015-01, Vol.2 (1), p.16502-14
Main Authors: Takemura, K, Nakano, S, Ohishi, Y, Nakamoto, Y, Fujihisa, H
Format: Article
Language:English
Subjects:
Anomalies
Cadmium
crystal structure
Diffraction
equation of state
Equations of state
high pressure
mercury
Mercury (metal)
phase transition
Pressure dependence
X-rays
Zinc
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Summary:High-pressure powder x-ray diffraction experiments have been carried out on solid mercury up to 196 GPa at room temperature. The hexagonal-close-packed δ phase, which exists above 36 GPa, is found to remain stable up to the highest pressure investigated. The c a axial ratio monotonously decreases under pressure in a manner similar to that of zinc and cadmium. There is no anomaly in the pressure dependence of the c a axial ratio. We present complete structural data of β, γ, and δ phases of solid mercury, which constrain the PV equation of state at 300 K.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/2/1/016502