A nanostructured rhombohedral Sb2Te3 was produced by Mechanical Alloying (MA) and
the effect of high-pressures over structural properties was investigated by in situ angle-
dispersive X-ray diffraction (ADXRD) and pairs distribution function analysis (PDF). For
this, the effect of pressure on lattice parameters, z coordinate and unit cell volume
were followed from Rietveld Method [1]. These data obtained were used to calculate
the partial [G ij (R)] and total [G(R)] pairs distribution functions. This study offered the
possibility of following the effect of high pressure in these functions to determine which
atomic pairs are most affected [2]. The behaviors seen in these functions were
associated to changes observed in the macroscopic physical properties reported at
literature for Sb2Te3.

ACKNOWLEDGEMENTS:
The authors acknowledge the Brazilian founding agencies CAPES and CNPq by the
financial support and the Programa de Pós-graduação em Ciência e Engenharia de
Materiais of Universidade Federal de Santa Catarina.

REFERENCES:
[1] H. M. Rietveld, J. Appl. Crystallogr. 2, 65 (1969).
[2] J. C. de Lima, Z. V. Borges, C. M. Poffo, S. M. Souza, D. M. Trichês, and R. S. de
Biasi, e-print arXiv:1803.05430.