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

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Original languageEnglish
Article number214501
Number of pages4
JournalThe Journal of Chemical Physics
Issue number21
Publication statusPublished - 7 Dec 2011


In situ x-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 similar to 0.38(4). In the layered anti-CdI(2)-type structure of rhenium hydride, the hydrogen solubility was found to increase to x similar to 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 similar to 0.85. The formation of fully stoichiometric rhenium hydride is discussed. (C) 2011 American Institute of Physics. [doi:10.1063/1.3652863]

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