Details

Autor(en) / Beteiligte

• Chuliá-Jordan, R.
• Santamaría-Pérez, D.
• Pereira, A.L.J.
• García-Domene, B.
• Vilaplana, R.
• Sans, J.A.
• Martínez-García, D.
• Morales-Garcia, A.
• Popescu, C.
• Muehle, C.
• Jansen, M.
• Manjón, F.J.

Titel

Structural and vibrational behavior of cubic Cu1.80(3)Se cuprous selenide, berzelianite, under compression

Ist Teil von

• Journal of alloys and compounds, 2020-07, Vol.830, p.154646, Article 154646

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• We have performed an experimental study of the crystal structure and lattice dynamics of cubic Cu1.80(3)Se at ambient temperature and high pressures. Two reversible phase transitions were found at 2.9 and 8.7 GPa. The indexation of the angle-dispersive synchrotron x-ray diffraction patterns suggests a large orthorhombic cell and a monoclinic cell for the high-pressure phases. Raman measurements provide additional information on the local structure. The compressibility of the three ambient temperature phases has been determined and compared to that of other sulphides and selenides. •Two previously unknown phase transitions have been found in Cu1.80(3)Se.•The initial cubic anti-fluorite-type phase transforms first into an orthorhombic and later into a monoclinic structure.•The compressibility of the low- and high-pressure phases has been determined.•High-pressure Cu1.80(3)Se phases differ from those recently reported for stoichiometric Cu2Se.