%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 }