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Zusammenfassung:
Raman spectroscopy and synchrotron angle-dispersive X-ray diffraction were applied to investigate pressure-induced phase transitions in lithium sulfide (Li2S). We observed two reversible transitions, first from the cubic antifluorite (Fm (3) over barm) phase to an orthorhombic anticotunnite (Pnma) phase at about 13 GPa, followed by a transition to the hexagonal Ni2In- type (P6(3)/mmc) structure above 30 GPa, as previously predicted by ab initio density functional theory calculations. (C) 2016 Elsevier Masson SAS. All rights reserved.
