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Joint experimental and theoretical study of PbGa2S4 under compression.
- Source :
- Journal of Materials Chemistry C; 9/14/2023, Vol. 11 Issue 34, p11606-11619, 14p
- Publication Year :
- 2023
-
Abstract
- The effect of pressure on the structural, vibrational, and optical properties of lead thiogallate, PbGa<subscript>2</subscript>S<subscript>4</subscript>, crystallizing under room conditions in the orthorhombic EuGa<subscript>2</subscript>S<subscript>4</subscript>-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′-Ga<subscript>2</subscript>S<subscript>3</subscript>, CdGa<subscript>2</subscript>S<subscript>4</subscript>, and HgGa<subscript>2</subscript>S<subscript>4</subscript>. Evidence of a partially reversible pressure-induced decomposition of PbGa<subscript>2</subscript>S<subscript>4</subscript> into a mixture of Pb<subscript>6</subscript>Ga<subscript>10</subscript>S<subscript>21</subscript> and Ga<subscript>2</subscript>S<subscript>3</subscript> above 15 GPa is reported. Thus, our measurements and calculations show a route for the high-pressure synthesis of Pb<subscript>6</subscript>Ga<subscript>10</subscript>S<subscript>21</subscript>, which is isostructural to the stable Pb<subscript>6</subscript>In<subscript>10</subscript>S<subscript>21</subscript> compound at room pressure. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507526
- Volume :
- 11
- Issue :
- 34
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry C
- Publication Type :
- Academic Journal
- Accession number :
- 171852662
- Full Text :
- https://doi.org/10.1039/d3tc02288a