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On the effects of high temperature and high pressure on the hydrogen solubility in rhenium

DOI: 10.1063/1.3652863 DOI Help

Authors: Thomas Scheler (The University of Edinburgh) , Olga Degtyareva (The University of Edinburgh) , Eugene Gregoryanz (The University of Edinburgh)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: The Journal Of Chemical Physics , VOL 135 (21)

State: Published (Approved)
Published: December 2011

Abstract: In situx-ray diffraction experiments on rhenium hydride compressed up to 46 GPa reveal a hydrogen solubility (x) significantly larger than the previously assumed saturation limit of x ? 0.38(4). In the layered anti-CdI2-type structure of rhenium hydride, the hydrogen solubility was found to increase to x ? 0.5 at 15 GPa over time. When heated to temperatures above 420 K at pressures above 23 GPa, rhenium hydride undergoes an isomorphous phase transition into the NiAs-type structure accompanied by an increase in hydrogen solubility to x ? 0.85. The formation of fully stoichiometric rhenium hydride is discussed.

Journal Keywords: Rhenium; Solubility; High Pressure; Diamond Anvil Cells; X-Ray Diffraction

Subject Areas: Physics

Instruments: I15-Extreme Conditions

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