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 SM ISO690:2012GOMIS, Oscar, VILAPLANA, Rosario Isabel, MANJON, Francisco Javier, SANTAMARIA-PEREZ, David, ERRANDONEA, Daniel J.H., PEREZ-GONZALEZ, Eduardo, LOPEZ-SOLANO, Javier, RODRIGUEZ-HERNANDEZ, Placida Rogelio, MUNOZ, Alfonso Gonzalez, TIGINYANU, Ion, URSACHI, Veaceslav. Crystal structure of HgGa2Se4 under compression. In: Materials Research Bulletin, 2013, vol. 48, pp. 2128-2133. ISSN 0025-5408. DOI: https://doi.org/10.1016/j.materresbull.2013.02.037 |
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  Materials Research Bulletin |
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| Volumul 48 / 2013 / ISSN 0025-5408 | |
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| DOI:https://doi.org/10.1016/j.materresbull.2013.02.037 | |
| Pag. 2128-2133 | |
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We report on high-pressure x-ray diffraction measurements up to 17.2 GPa in mercury digallium selenide (HgGa2Se4). The equation of state and the axial compressibilities for the low-pressure tetragonal phase have been determined and compared to related compounds. HgGa2Se 4 exhibits a phase transition on upstroke toward a disordered rock-salt structure beyond 17 GPa, while on downstroke it undergoes a phase transition below 2.1 GPa to a phase that could be assigned to a metastable zinc-blende structure with a total cation-vacancy disorder. Thermal annealing at low- and high-pressure shows that kinetics plays an important role on pressure-driven transitions. |
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| Cuvinte-cheie A. Chalcogénides, C. High pressure, C. X-ray diffraction, D. Crystal structure, D. Phase transitions |
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