Synthesis and properties of platinum hydride
T Scheler, O Degtyareva, M Marqués… - Physical Review B …, 2011 - APS
Physical Review B—Condensed Matter and Materials Physics, 2011•APS
Synchrotron x-ray diffraction experiments on compressed platinum-hydrogen mixtures
reveal the formation of platinum hydride at a pressure of 27 (1) GPa at room temperature.
This compound exhibits two phases, PtH-I and PtH-II, coexisting up to the pressure of 42
GPa, above which the single phase of PtH-II is observed. Pt atoms in the PtH-II phase are
shown to form a hexagonal closed-packed structure. This phase exhibits a high bulk
modulus of 310 (10) GPa and is stable up to at least 53 GPa. Ab initio calculations show that …
reveal the formation of platinum hydride at a pressure of 27 (1) GPa at room temperature.
This compound exhibits two phases, PtH-I and PtH-II, coexisting up to the pressure of 42
GPa, above which the single phase of PtH-II is observed. Pt atoms in the PtH-II phase are
shown to form a hexagonal closed-packed structure. This phase exhibits a high bulk
modulus of 310 (10) GPa and is stable up to at least 53 GPa. Ab initio calculations show that …
Synchrotron x-ray diffraction experiments on compressed platinum-hydrogen mixtures reveal the formation of platinum hydride at a pressure of 27(1) GPa at room temperature. This compound exhibits two phases, PtH-I and PtH-II, coexisting up to the pressure of 42 GPa, above which the single phase of PtH-II is observed. Pt atoms in the PtH-II phase are shown to form a hexagonal closed-packed structure. This phase exhibits a high bulk modulus of 310 (10) GPa and is stable up to at least 53 GPa. Ab initio calculations show that PtH-II is superconducting with 12 K at 90 GPa, the highest temperature of superconducting transition among any known metal hydride.
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