%0 Journal Article %1 WOS:000182843200001 %A Teixeira, E %A Mendes, J %A Melo, FEA %A Ayala, AP %A Gesland, JY %A Paschoal, CWA %A Moreira, RL %C PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS %D 2003 %I ELSEVIER SCIENCE BV %J VIBRATIONAL SPECTROSCOPY %K Raman infrared reflectivity} scattering; spectrum; vibrational {Na2ThF6; %N 2 %P 159-166 %R 10.1016/S0924-2031(03)00012-2 %T Vibrational spectrum of Na2ThF6 single crystals %V 31 %X Single crystals of the Na2ThF6 hexafluor metallate were studied by polarized infrared reflectivity and Raman scattering. This compound belongs to the P321 (D-3(2)) space group and, contrary to most of the members of A(2)MX(6) family, it is not characterized by ThF62- polyhedra but by trigonal tricapped prisms. Raman and infrared spectra were analyzed based on the factor group analysis and all the phonons at the Brillouin zone center were determined. Directional dispersion branches of the polar modes were calculated and used to identify polarization leaks and mixed excitations. (C) 2003 Elsevier Science B.V. All rights reserved.

@article{WOS:000182843200001, abstract = {Single crystals of the Na2ThF6 hexafluor metallate were studied by polarized infrared reflectivity and Raman scattering. This compound belongs to the P321 (D-3(2)) space group and, contrary to most of the members of A(2)MX(6) family, it is not characterized by ThF62- polyhedra but by trigonal tricapped prisms. Raman and infrared spectra were analyzed based on the factor group analysis and all the phonons at the Brillouin zone center were determined. Directional dispersion branches of the polar modes were calculated and used to identify polarization leaks and mixed excitations. (C) 2003 Elsevier Science B.V. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, author = {Teixeira, E and Mendes, J and Melo, FEA and Ayala, AP and Gesland, JY and Paschoal, CWA and Moreira, RL}, biburl = {https://www.bibsonomy.org/bibtex/2f233c094e8bec1d6cf24a260ecdc908d/ppgfis_ufc_br}, doi = {10.1016/S0924-2031(03)00012-2}, interhash = {8bdcf7cce54bcbf7913744ba1a4a26b1}, intrahash = {f233c094e8bec1d6cf24a260ecdc908d}, issn = {0924-2031}, journal = {VIBRATIONAL SPECTROSCOPY}, keywords = {Raman infrared reflectivity} scattering; spectrum; vibrational {Na2ThF6;}, number = 2, pages = {159-166}, publisher = {ELSEVIER SCIENCE BV}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Vibrational spectrum of Na2ThF6 single crystals}, tppubtype = {article}, volume = 31, year = 2003 }