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The 0.96(Bi 0.5 Na 0.5 )TiO 3 – 0.04BaTiO 3 crystal structure: A high‐Q, high‐counting statistics synchrotron diffraction analysis
Author(s) -
FuentesCobas L. E.,
Pardo L.,
MonteroCabrera M. E.,
Plaisier J. R.,
García A.,
Brebøl K.,
Mercadelli E.,
Galassi C.
Publication year - 2014
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201300433
Subject(s) - monoclinic crystal system , diffraction , synchrotron , x ray crystallography , crystallography , materials science , crystal structure , powder diffraction , physics , optics , chemistry
A synchrotron powder diffraction experiment, especially designed to shed light on the controversial problem of the crystal structure of 0.96(Bi 0.5 Na 0.5 )TiO 3 – 0.04BaTiO 3 , is reported. The investigated material is a key component of the current international search for lead‐free ferro‐piezoelectrics. A wide angular range diffraction pattern was measured in high resolution configuration, with emphasis on trustable counting stastistics in the high‐Q interval. Cc and R3c structural models were tried as primary phases. The obtained experimental results are incompatible with the monoclinic model and clearly favor the rhombohedral symmetry.