Phase transitions in Pb 8 O 5 (XO 4 ) 2  (X = As and V) compounds | Zendy

Oliveira E. A. | Zendy; Silva E. N. | Zendy; Paschoal A. R. | Zendy; Dantas S. M. | Zendy; Guedes I. | Zendy; MendesFilho J. | Zendy; Polla G. | Zendy; Ayala A. P. | Zendy

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Phase transitions in Pb 8 O 5 (XO 4 ) 2 (X = As and V) compounds

Author(s) -

Oliveira E. A.,

Silva E. N.,

Paschoal A. R.,

Dantas S. M.,

Guedes I.,

MendesFilho J.,

Polla G.,

Ayala A. P.

Publication year - 2011

Publication title -

journal of raman spectroscopy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.748

H-Index - 110

eISSN - 1097-4555

pISSN - 0377-0486

DOI - 10.1002/jrs.2886

Subject(s) - raman spectroscopy , phase transition , crystallography , analytical chemistry (journal) , phase (matter) , chemistry , order (exchange) , spectroscopy , oxide , x ray crystallography , materials science , mineralogy , diffraction , physics , condensed matter physics , optics , organic chemistry , finance , quantum mechanics , economics , chromatography

Raman spectroscopy, polarized microscopy and thermal measurements were used to investigate the sequence of phase transition in the lead oxide salts Pb 8 O 5 (XO 4 ) 2 (where X = As and V). For Pb 8 O 5 (AsO 4 ) 2 , a second‐order phase transition is observed at 500 K. For Pb 8 O 5 (VO 4 ) 2 , a second‐order and a first‐order structural phase transitions are observed at 425 and 525 K, respectively. The ferroelastic character of Pb 8 O 5 (VO 4 ) 2 is also discussed. Copyright © 2011 John Wiley & Sons, Ltd.

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