Tania Garcia-Sanchez, Samuel Gallego-Parra, Akun Liang, José Luis Rodrigo-Ramon, Alfonso Muñoz, Plácida Rodriguez-Hernandez, Javier Gonzalez-Platas, Juán Ángel Sans, Vanesa Paula Cuenca-Gotor, Hussien H Osman, Catalin Popescu, Veaceslav Ursaki, Ion M Tiginyanu, Daniel Errandonea, Francisco Javier Manjón
The effect of pressure on the structural, vibrational, and optical properties of lead thiogallate, PbGa2 S4 , crystallizing under room conditions in the orthorhombic EuGa2 S4 -type structure (space group Fddd ), is investigated. The results from X-ray diffraction, Raman scattering, and optical-absorption measurements at a high pressure beyond 20 GPa are reported and compared not only to ab initio calculations, but also to the related compounds α'-Ga2 S3 , CdGa2 S4 , and HgGa2 S4 . Evidence of a partially reversible pressure-induced decomposition of PbGa2 S4 into a mixture of Pb6 Ga10 S21 and Ga2 S3 above 15 GPa is reported...
August 31, 2023: Journal of Materials Chemistry. C, Materials for Optical and Electronic Devices