Speaker
Mrs
Vanesa Paula Cuenca-Gotor
(UPV)
Description
The structural properties of arsenic telluride with monoclinic C2/m structure (alpha-As2Te3) have been studied both experimentally and theoretically under compression at room temperature by means of X-ray powder diffraction measurements up to 23 GPa and total-energy *ab initio* calculations. It has been found experimentally that alpha-As2Te3 remains in its initial monoclinic structure up to 14 GPa. At this pressure, a phase transition is observed in contrast to previous results that reported a phase transition between 6 and 8 GPa to the R-3m phase (beta-As2Te3) [1]. The pressure dependence of the structural parameters and equation of state for the low-pressure phase of As2Te3 have been determined by Rietveld refinement. The reported results are compared with those available in the literature for related *A2X3* compounds.
References
[1] T.J. Scheidelmantel, J.F. Meng and J.V. Badding, J. Phys. Chem. Solids 66, 1744 (2005).
Primary author
Mrs
Vanesa Paula Cuenca-Gotor
(UPV)
Co-authors
Dr
Catalin Popescu
(ALBA)
Prof.
Francisco Javier Manjón
(UPV)
Dr
Jordi Ibáñez
(CSIC)
Dr
Juan Ángel Sans
(UPV)
