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Inicio » Actividades I+D > Publicaciones 2011 > Phase transitions in Pb8O5(XO4)2 (X = As...
artículo con referato
"Phase transitions in Pb8O5(XO4)2 (X = As and V) compounds"
E.A. Oliveira, E.N. Silva, A.R. Paschoal, S.M. Dantas, I. Guedes, J. Mendes Filho, G. Polla and A.P. Ayala
J. Raman. Spectrosc. 42(7) (2011) 1567-1573
Abstract
Raman spectroscopy, polarized microscopy and thermal measurements were used to investigate the sequence of phase transition in the lead oxide salts Pb8O5(XO4)2 (where X = As and V). For Pb8O5(AsO4)2, a second-order phase transition is observed at 500 K. For Pb8O5(VO4)2, a second-order and a first-order structural phase transitions are observed at 425 and 525 K, respectively. The ferroelastic character of Pb8O5(VO4)2 is also discussed.
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