Raman scattering and infrared transmittance techniques were used to
investigate the room-temperature phonon spectra of the polycrystalline
Ba3In2UO9, Sr3In2UO9, Ba3In2WO9 and Sr3In2WO9 double perovskites.
Although X-ray diffraction has shown that both Ba3In2UO9 and Ba3In2WO9
crystallize in a disordered cubic (Pm (3) over barm-O-h(1)) structure with one formula unit per unit cell (Z = 1), Raman measurements revealed
that both Ba3In2UO9 and Ba3In2WO9 compounds should exhibit a 1:1 ordered
domains with Fm (3) over barm symmetry, embedded in the Pm (3) over barm
matrix. Observation of a nu(1)-like vibration of the InO6 octahedron
reflects the occurrence of a two-phonon-like behavior due to the
intrinsic occupational disorder at octahedral symmetry sites. Assignment
of most of the Raman and infrared phonons is also given. Copyright (C)
2009 John Wiley & Sons, Ltd.
%0 Journal Article
%1 WOS:000269706400029
%A Silva, E N
%A Ayala, A P
%A Guedes, I
%A Larregola, S A
%A Pinacca, R M
%A del Viola, M C
%A Pedregosa, J C
%C 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
%D 2009
%I WILEY
%J JOURNAL OF RAMAN SPECTROSCOPY
%K FT-IR In-U In-W Raman and oxides; perovskites; scattering} transmittance; {double
%N 8
%P 1028-1032
%R 10.1002/jrs.2225
%T Vibrational study of A(3)In(2)B `' O-9 (A = Ba, Sr; B `' = U, W) double
perovskites
%V 40
%X Raman scattering and infrared transmittance techniques were used to
investigate the room-temperature phonon spectra of the polycrystalline
Ba3In2UO9, Sr3In2UO9, Ba3In2WO9 and Sr3In2WO9 double perovskites.
Although X-ray diffraction has shown that both Ba3In2UO9 and Ba3In2WO9
crystallize in a disordered cubic (Pm (3) over barm-O-h(1)) structure with one formula unit per unit cell (Z = 1), Raman measurements revealed
that both Ba3In2UO9 and Ba3In2WO9 compounds should exhibit a 1:1 ordered
domains with Fm (3) over barm symmetry, embedded in the Pm (3) over barm
matrix. Observation of a nu(1)-like vibration of the InO6 octahedron
reflects the occurrence of a two-phonon-like behavior due to the
intrinsic occupational disorder at octahedral symmetry sites. Assignment
of most of the Raman and infrared phonons is also given. Copyright (C)
2009 John Wiley & Sons, Ltd.
@article{WOS:000269706400029,
abstract = {Raman scattering and infrared transmittance techniques were used to
investigate the room-temperature phonon spectra of the polycrystalline
Ba3In2UO9, Sr3In2UO9, Ba3In2WO9 and Sr3In2WO9 double perovskites.
Although X-ray diffraction has shown that both Ba3In2UO9 and Ba3In2WO9
crystallize in a disordered cubic (Pm (3) over barm-O-h(1)) structure with one formula unit per unit cell (Z = 1), Raman measurements revealed
that both Ba3In2UO9 and Ba3In2WO9 compounds should exhibit a 1:1 ordered
domains with Fm (3) over barm symmetry, embedded in the Pm (3) over barm
matrix. Observation of a nu(1)-like vibration of the InO6 octahedron
reflects the occurrence of a two-phonon-like behavior due to the
intrinsic occupational disorder at octahedral symmetry sites. Assignment
of most of the Raman and infrared phonons is also given. Copyright (C)
2009 John Wiley & Sons, Ltd.},
added-at = {2022-05-23T20:00:14.000+0200},
address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA},
author = {Silva, E N and Ayala, A P and Guedes, I and Larregola, S A and Pinacca, R M and del Viola, M C and Pedregosa, J C},
biburl = {https://www.bibsonomy.org/bibtex/26a74bf03f9880c48055df68dad804dec/ppgfis_ufc_br},
doi = {10.1002/jrs.2225},
interhash = {e3c07b56ed65659215d432905a6d60b3},
intrahash = {6a74bf03f9880c48055df68dad804dec},
issn = {0377-0486},
journal = {JOURNAL OF RAMAN SPECTROSCOPY},
keywords = {FT-IR In-U In-W Raman and oxides; perovskites; scattering} transmittance; {double},
number = 8,
pages = {1028-1032},
publisher = {WILEY},
pubstate = {published},
timestamp = {2022-05-23T20:00:14.000+0200},
title = {Vibrational study of A(3)In(2)B `' O-9 (A = Ba, Sr; B `' = U, W) double
perovskites},
tppubtype = {article},
volume = 40,
year = 2009
}