Hydrogen solubility in amorphous Mg0.6SiO2.6 at high pressure
| Autor: | Nicolay V. Barkovskii, V. K. Fedotov, K. P. Meletov, V. S. Efimchenko |
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| Rok vydání: | 2017 |
| Předmět: |
Quenching
Phase transition Materials science Hydrogen Analytical chemistry General Physics and Astronomy chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid symbols.namesake chemistry Formula unit symbols Molecule Solubility 0210 nano-technology Raman spectroscopy |
| Zdroj: | Journal of Experimental and Theoretical Physics. 124:914-919 |
| ISSN: | 1090-6509 1063-7761 |
| Popis: | The solubility of hydrogen in amorphous Mg0.6SiO2.6 at a temperature of 250°C and pressures up to 75 kbar is studied using a quenching technique. The molar ratio H2/formula unit is found to nonlinearly increase with pressure from x = 0.12 at P = 10 kbar to x = 0.303 at P = 75 kbar. An investigation of the quenched samples by Raman spectroscopy demonstrated that hydrogen dissolves in amorphous Mg0.6SiO2.6 in the form of H2 molecules. X-ray diffraction and Raman studies showed that the hydrogenation of the samples is likely to be accompanied by a phase transition in the amorphous lattice of Mg0.6SiO2.6 at P ≈ 52.5 kbar to a denser amorphous modification. |
| Databáze: | OpenAIRE |
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