Results 251 to 260 of about 304,291 (300)
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Raman spectra of Nd1.85Ce0.15CuO4
Solid State Communications, 1991Abstract We present the polarized Raman scattering spectra of the Nd 1.85 Ce 0.15 CuO 4 single crystal at room temperature. In addition to the three known Raman active phonons of this high temperature oxide at 227cm −1 (A 1g ), 330 cm −1 (B 1g ), and 477 cm −1 (E g ), the remaining E g symmetry mode at 122 cm −1 is clearly observed.
Z.V. Popovic, A. Sacuto, M. Balkanski
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Raman Spectra of Carbohydrates
Journal of the Chinese Chemical Society, 1972AbstractThe Raman spectra of 13 different carbohydrates are investigated by a laser Raman spectrometer. It is found the C—H stretching vibrations around 3000 cm−1 is the best region for qualitative analysis of these compounds. All compounds show an O—H stretching vibration around 3370 cm−1 which was not mentioned by earlier works.
I‐Cheng Wang, Chen‐Hanson Ting
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Ferroelectrics, 1971
The Raman spectra of Ba2NaNb5O15 single crystals were recorded for various scattering configurations from 77°K to 843°K. Splittings of the vibrational modes due to electrostatic and anisotropic forces were found to be small. The line-widths of the 650 cm-1 and the 280 cm-1 modes were found to increase with increasing temperature.
L. C. Bobb, I. Lefkowitz, L. Muldawer
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The Raman spectra of Ba2NaNb5O15 single crystals were recorded for various scattering configurations from 77°K to 843°K. Splittings of the vibrational modes due to electrostatic and anisotropic forces were found to be small. The line-widths of the 650 cm-1 and the 280 cm-1 modes were found to increase with increasing temperature.
L. C. Bobb, I. Lefkowitz, L. Muldawer
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Spectrochimica Acta Part A: Molecular Spectroscopy, 1978
Abstract Four single crystals of tourmaline lying within the elbaite: Na(Li, Al) 3 Al 6 B 3 Si 6 O 27 (OH, F) 4 -schorl: Na(Fe 2+ ) 3 Al 6 B 3 Si 6 O 27 (OH, F) 4 series have been studied. The spectra were recorded at the 100–1200 cm −1 region. From a dynamical point of view it appears that tourmaline structure can not be subdivided in separate ...
M.A. Alvarez, R. Coy-Yll
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Abstract Four single crystals of tourmaline lying within the elbaite: Na(Li, Al) 3 Al 6 B 3 Si 6 O 27 (OH, F) 4 -schorl: Na(Fe 2+ ) 3 Al 6 B 3 Si 6 O 27 (OH, F) 4 series have been studied. The spectra were recorded at the 100–1200 cm −1 region. From a dynamical point of view it appears that tourmaline structure can not be subdivided in separate ...
M.A. Alvarez, R. Coy-Yll
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Journal of Quantitative Spectroscopy and Radiative Transfer, 1982
Abstract The normal modes of the Raman-active phonons in the center of the Brillouin zone in a natural monocrystal of Mg 2 SiO 4 were measured by using Raman scattering. All of the modes predicted by group theory were observed and measured. Some deviations from previously published values in synthetic samples were observed for the low energy phonons.
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Abstract The normal modes of the Raman-active phonons in the center of the Brillouin zone in a natural monocrystal of Mg 2 SiO 4 were measured by using Raman scattering. All of the modes predicted by group theory were observed and measured. Some deviations from previously published values in synthetic samples were observed for the low energy phonons.
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RAMAN SPECTRA OF ALKALI HALIDES
1965Raman spectroscopy is a powerful tool for the study of the structure of matter and the physicochemical problems of the crystalline states of matter. However, in the case of cubic crystals, because of the symmetry properties, most and in some cases all the fundamental modes of vibration are inactive in the Raman effect.
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Journal of Polymer Science Part A: General Papers, 1965
AbstractExperimental techniques for the measurements of the Raman spectra of crystalline high polymers have been developed. The preparation of samples and a procedure for the measurements are described in some detail. The Raman spectra of polyoxymethylene (CH2O)n, deuterated polyoxymethylene (CD2O)n, poly(ethylene oxide) (CH2CH2O)n, and ...
Yoshiki Matsui +3 more
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AbstractExperimental techniques for the measurements of the Raman spectra of crystalline high polymers have been developed. The preparation of samples and a procedure for the measurements are described in some detail. The Raman spectra of polyoxymethylene (CH2O)n, deuterated polyoxymethylene (CD2O)n, poly(ethylene oxide) (CH2CH2O)n, and ...
Yoshiki Matsui +3 more
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Proceedings of the Indian Academy of Sciences - Section A, 1938
The available Raman spectral data on terpenic compounds are tabulated and reviewed. It is concluded that the identification of the constituents of a mixture of terpenes by Raman effect methods cannot give trustworthy results until confirmatory results on possible constituents have been obtained.
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The available Raman spectral data on terpenic compounds are tabulated and reviewed. It is concluded that the identification of the constituents of a mixture of terpenes by Raman effect methods cannot give trustworthy results until confirmatory results on possible constituents have been obtained.
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Raman Spectra of Polyethylenes
The Journal of Chemical Physics, 1963Raman spectra of normal and deuterated polyethylenes in the solid and liquid states were obtained. Tentative assignments for (CD2)n are made using the Teller—Redlich product rule and Krimm's isotopic frequency rule. Interactions between the CD2 deformation and the symmetrical C–C stretching modes of species Ag, and between the CD2 wagging and the ...
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Nature, 1931
I HAVE been investigating the Raman effect in a number of crystals, using the same method of excitation which proved to be particularly successful with gases.1 The primary source consists of a powerful water-cooled mercury arc, which gives an extremely intense and sharp resonance line λ2537.
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I HAVE been investigating the Raman effect in a number of crystals, using the same method of excitation which proved to be particularly successful with gases.1 The primary source consists of a powerful water-cooled mercury arc, which gives an extremely intense and sharp resonance line λ2537.
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